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

@@ -867,9 +867,7 @@ class _DatePickerHeader extends StatelessWidget {
 
     switch (orientation) {
       case Orientation.portrait:
-        return Semantics(
-          container: true,
-          child: SizedBox(
+        return SizedBox(
           height: _datePickerHeaderPortraitHeight,
           child: Material(
             color: backgroundColor,
@@ -889,22 +887,16 @@ class _DatePickerHeader extends StatelessWidget {
                     children: <Widget>[
                       Expanded(child: title),
                       if (entryModeButton != null)
-                         Semantics(
-                          container: true,
-                          child: entryModeButton,
-                        ),
+                        entryModeButton!,
                     ],
                   ),
                 ],
               ),
             ),
           ),
-          ),
         );
       case Orientation.landscape:
-        return Semantics(
-          container: true,
-          child:SizedBox(
+        return SizedBox(
           width: _datePickerHeaderLandscapeWidth,
           child: Material(
             color: backgroundColor,
@@ -930,15 +922,11 @@ class _DatePickerHeader extends StatelessWidget {
                 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

@@ -256,14 +256,11 @@ class _InputDatePickerFormFieldState extends State<InputDatePickerFormField> {
       ?? theme.inputDecorationTheme.border
       ?? (useMaterial3 ? const OutlineInputBorder() : const UnderlineInputBorder());
 
-    return Semantics(
-      container: true,
-      child: TextFormField(
+    return TextFormField(
       decoration: InputDecoration(
         hintText: widget.fieldHintText ?? localizations.dateHelpText,
         labelText: widget.fieldLabelText ?? localizations.dateInputLabel,
-        ).applyDefaults(
-          inputTheme
+      ).applyDefaults(inputTheme
         .merge(datePickerTheme.inputDecorationTheme)
         .copyWith(border: effectiveInputBorder),
       ),
@@ -274,7 +271,6 @@ class _InputDatePickerFormFieldState extends State<InputDatePickerFormField> {
       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(