Reverts "[a11y] Fix date picker cannot focus on the edit field (#143117)" (#143493)

Reverts flutter/flutter#143117

Initiated by: dnfield

Reason for reverting: made the tree red.

Original PR Author: hangyujin

Reviewed By: {QuncCccccc}

This change reverts the following previous change:
Original Description:
fixes: https://github.com/flutter/flutter/issues/143116
fixes: https://github.com/flutter/flutter/issues/141992

https://b.corp.google.com/issues/322173632

packages/flutter/lib/src/material/calendar_date_picker.dart

@@ -394,7 +394,6 @@ class _DatePickerModeToggleButtonState extends State<_DatePickerModeToggleButton
               label: MaterialLocalizations.of(context).selectYearSemanticsLabel,
               excludeSemantics: true,
               button: true,
-              container: true,
               child: SizedBox(
                 height: _subHeaderHeight,
                 child: InkWell(

packages/flutter/lib/src/material/date_picker.dart

@@ -867,76 +867,64 @@ class _DatePickerHeader extends StatelessWidget {
 
     switch (orientation) {
       case Orientation.portrait:
-        return Semantics(
-          container: true,
-          child: SizedBox(
-            height: _datePickerHeaderPortraitHeight,
-            child: Material(
-              color: backgroundColor,
-              child: Padding(
-                padding: const EdgeInsetsDirectional.only(
-                  start: 24,
-                  end: 12,
-                  bottom: 12,
-                ),
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: <Widget>[
-                    const SizedBox(height: 16),
-                    help,
-                    const Flexible(child: SizedBox(height: 38)),
-                    Row(
-                      children: <Widget>[
-                        Expanded(child: title),
-                        if (entryModeButton != null)
-                         Semantics(
-                          container: true,
-                          child: entryModeButton,
-                        ),
-                      ],
-                    ),
-                  ],
-                ),
+        return SizedBox(
+          height: _datePickerHeaderPortraitHeight,
+          child: Material(
+            color: backgroundColor,
+            child: Padding(
+              padding: const EdgeInsetsDirectional.only(
+                start: 24,
+                end: 12,
+                bottom: 12,
               ),
-            ),
-          ),
-        );
-      case Orientation.landscape:
-        return Semantics(
-          container: true,
-          child:SizedBox(
-            width: _datePickerHeaderLandscapeWidth,
-            child: Material(
-              color: backgroundColor,
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: <Widget>[
                   const SizedBox(height: 16),
-                  Padding(
+                  help,
+                  const Flexible(child: SizedBox(height: 38)),
+                  Row(
+                    children: <Widget>[
+                      Expanded(child: title),
+                      if (entryModeButton != null)
+                        entryModeButton!,
+                    ],
+                  ),
+                ],
+              ),
+            ),
+          ),
+        );
+      case Orientation.landscape:
+        return SizedBox(
+          width: _datePickerHeaderLandscapeWidth,
+          child: Material(
+            color: backgroundColor,
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: <Widget>[
+                const SizedBox(height: 16),
+                Padding(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: _headerPaddingLandscape,
+                  ),
+                  child: help,
+                ),
+                SizedBox(height: isShort ? 16 : 56),
+                Expanded(
+                  child: Padding(
                     padding: const EdgeInsets.symmetric(
                       horizontal: _headerPaddingLandscape,
                     ),
-                    child: help,
+                    child: title,
                   ),
-                  SizedBox(height: isShort ? 16 : 56),
-                  Expanded(
-                    child: Padding(
-                      padding: const EdgeInsets.symmetric(
-                        horizontal: _headerPaddingLandscape,
-                      ),
-                      child: title,
-                    ),
+                ),
+                if (entryModeButton != null)
+                  Padding(
+                    padding: const EdgeInsets.symmetric(horizontal: 4),
+                    child: entryModeButton,
                   ),
-                  if (entryModeButton != null)
-                    Padding(
-                      padding: const EdgeInsets.symmetric(horizontal: 4),
-                      child: Semantics(
-                        container: true,
-                        child: entryModeButton,
-                      ),
-                    ),
-                ],
-              ),
+              ],
             ),
           ),
         );

packages/flutter/lib/src/material/input_date_picker_form_field.dart

@@ -256,25 +256,21 @@ class _InputDatePickerFormFieldState extends State<InputDatePickerFormField> {
       ?? theme.inputDecorationTheme.border
       ?? (useMaterial3 ? const OutlineInputBorder() : const UnderlineInputBorder());
 
-    return Semantics(
-      container: true,
-      child: TextFormField(
-        decoration: InputDecoration(
-          hintText: widget.fieldHintText ?? localizations.dateHelpText,
-          labelText: widget.fieldLabelText ?? localizations.dateInputLabel,
-        ).applyDefaults(
-          inputTheme
-              .merge(datePickerTheme.inputDecorationTheme)
-              .copyWith(border: effectiveInputBorder),
-        ),
-        validator: _validateDate,
-        keyboardType: widget.keyboardType ?? TextInputType.datetime,
-        onSaved: _handleSaved,
-        onFieldSubmitted: _handleSubmitted,
-        autofocus: widget.autofocus,
-        controller: _controller,
-        focusNode: widget.focusNode,
+    return TextFormField(
+      decoration: InputDecoration(
+        hintText: widget.fieldHintText ?? localizations.dateHelpText,
+        labelText: widget.fieldLabelText ?? localizations.dateInputLabel,
+      ).applyDefaults(inputTheme
+        .merge(datePickerTheme.inputDecorationTheme)
+        .copyWith(border: effectiveInputBorder),
       ),
+      validator: _validateDate,
+      keyboardType: widget.keyboardType ?? TextInputType.datetime,
+      onSaved: _handleSaved,
+      onFieldSubmitted: _handleSubmitted,
+      autofocus: widget.autofocus,
+      controller: _controller,
+      focusNode: widget.focusNode,
     );
   }
 }

packages/flutter/test/material/date_picker_test.dart

@@ -13,7 +13,6 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
-import '../widgets/clipboard_utils.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
@@ -1578,13 +1577,6 @@ void main() {
     });
 
     testWidgets('input mode', (WidgetTester tester) async {
-      // Fill the clipboard so that the Paste option is available in the text
-      // selection menu.
-      final MockClipboard mockClipboard = MockClipboard();
-      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.platform, mockClipboard.handleMethodCall);
-      await Clipboard.setData(const ClipboardData(text: 'Clipboard data'));
-      addTearDown(() => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.platform, null));
-
       final SemanticsHandle semantics = tester.ensureSemantics();
 
       initialEntryMode = DatePickerEntryMode.input;
@@ -1604,20 +1596,7 @@ void main() {
           isFocusable: true,
         ));
 
-        expect(tester.getSemantics(find.byType(EditableText)), matchesSemantics(
-          label: 'Enter Date',
-          isTextField: true,
-          isFocused: true,
-          value: '01/15/2016',
-          hasTapAction: true,
-          hasSetTextAction: true,
-          hasSetSelectionAction: true,
-          hasCopyAction: true,
-          hasCutAction: true,
-          hasPasteAction: true,
-          hasMoveCursorBackwardByCharacterAction: true,
-          hasMoveCursorBackwardByWordAction: true,
-        ));
+        // The semantics of the InputDatePickerFormField are tested in its tests.
 
         // Ok/Cancel buttons
         expect(tester.getSemantics(find.text('OK')), matchesSemantics(