Revert "Add support for Tooltip hover (#31561)" (#31692)

This reverts commit eca93640 because of four
performance regressions. Will fix and re-land.

packages/flutter/test/material/tooltip_test.dart

@@ -11,7 +11,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 
-import '../rendering/mock_canvas.dart';
 import '../widgets/semantics_tester.dart';
 import 'feedback_tester.dart';
 
@@ -68,7 +67,7 @@ void main() {
         ),
       ),
     );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
+    (key.currentState as dynamic).ensureTooltipVisible(); // before using "as dynamic" in your code, see note top of file
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
 
     /********************* 800x600 screen
@@ -124,7 +123,7 @@ void main() {
         ),
       ),
     );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
+    (key.currentState as dynamic).ensureTooltipVisible(); // before using "as dynamic" in your code, see note top of file
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
 
     /********************* 800x600 screen
@@ -176,7 +175,7 @@ void main() {
         ),
       ),
     );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
+    (key.currentState as dynamic).ensureTooltipVisible(); // before using "as dynamic" in your code, see note top of file
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
 
     /********************* 800x600 screen
@@ -230,7 +229,7 @@ void main() {
         ),
       ),
     );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
+    (key.currentState as dynamic).ensureTooltipVisible(); // before using "as dynamic" in your code, see note top of file
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
 
     // we try to put it here but it doesn't fit:
@@ -295,7 +294,7 @@ void main() {
         ),
       ),
     );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
+    (key.currentState as dynamic).ensureTooltipVisible(); // before using "as dynamic" in your code, see note top of file
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
 
     /********************* 800x600 screen
@@ -348,7 +347,7 @@ void main() {
         ),
       ),
     );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
+    (key.currentState as dynamic).ensureTooltipVisible(); // before using "as dynamic" in your code, see note top of file
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
 
     /********************* 800x600 screen
@@ -403,7 +402,7 @@ void main() {
         ),
       ),
     );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
+    (key.currentState as dynamic).ensureTooltipVisible(); // before using "as dynamic" in your code, see note top of file
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
 
     /********************* 800x600 screen
@@ -423,82 +422,6 @@ void main() {
     expect(tip.localToGlobal(tip.size.bottomRight(Offset.zero)).dy, equals(324.0));
   });
 
-  testWidgets('Does tooltip end up with the right default size, shape, and color', (WidgetTester tester) async {
-    final GlobalKey key = GlobalKey();
-    await tester.pumpWidget(
-      Directionality(
-        textDirection: TextDirection.ltr,
-        child: Overlay(
-          initialEntries: <OverlayEntry>[
-            OverlayEntry(
-              builder: (BuildContext context) {
-                return Tooltip(
-                  key: key,
-                  message: tooltipText,
-                  child: Container(
-                    width: 0.0,
-                    height: 0.0,
-                  ),
-                );
-              },
-            ),
-          ],
-        ),
-      ),
-    );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
-    await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
-
-    final RenderBox tip = tester.renderObject(find.text(tooltipText)).parent.parent.parent.parent;
-
-    expect(tip.size.height, equals(32.0));
-    expect(tip.size.width, equals(74.0));
-    expect(tip, paints..rrect(
-      rrect: RRect.fromRectAndRadius(tip.paintBounds, const Radius.circular(4.0)),
-      color: const Color(0xe6616161),
-    ));
-  });
-
-  testWidgets('Can tooltip decoration be customized', (WidgetTester tester) async {
-    final GlobalKey key = GlobalKey();
-    const Decoration customDecoration = ShapeDecoration(
-      shape: StadiumBorder(),
-      color: Color(0x80800000),
-    );
-    await tester.pumpWidget(
-      Directionality(
-        textDirection: TextDirection.ltr,
-        child: Overlay(
-          initialEntries: <OverlayEntry>[
-            OverlayEntry(
-              builder: (BuildContext context) {
-                return Tooltip(
-                  key: key,
-                  decoration: customDecoration,
-                  message: tooltipText,
-                  child: Container(
-                    width: 0.0,
-                    height: 0.0,
-                  ),
-                );
-              },
-            ),
-          ],
-        ),
-      ),
-    );
-    (key.currentState as dynamic).ensureTooltipVisible(); // Before using "as dynamic" in your code, see note at the top of the file.
-    await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)
-
-    final RenderBox tip = tester.renderObject(find.text(tooltipText)).parent.parent.parent.parent;
-
-    expect(tip.size.height, equals(32.0));
-    expect(tip.size.width, equals(74.0));
-    expect(tip, paints..path(
-      color: const Color(0x80800000),
-    ));
-  });
-
   testWidgets('Tooltip stays around', (WidgetTester tester) async {
     await tester.pumpWidget(
       MaterialApp(
@@ -534,50 +457,6 @@ void main() {
     gesture.up();
   });
 
-  testWidgets('Tooltip shows/hides when hovered', (WidgetTester tester) async {
-    const Duration waitDuration = Duration(milliseconds: 0);
-    const Duration showDuration = Duration(milliseconds: 1500);
-    await tester.pumpWidget(
-      MaterialApp(
-        home: Center(
-          child: Tooltip(
-            message: tooltipText,
-            showDuration: showDuration,
-            waitDuration: waitDuration,
-            child: Container(
-              width: 100.0,
-              height: 100.0,
-            ),
-          ),
-        ),
-      )
-    );
-
-    final Finder tooltip = find.byType(Tooltip);
-    final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
-    await gesture.moveTo(Offset.zero);
-    await tester.pump();
-    await gesture.moveTo(tester.getCenter(tooltip));
-    await tester.pump();
-    // Wait for it to appear.
-    await tester.pump(waitDuration);
-    expect(find.text(tooltipText), findsOneWidget);
-
-    // Wait a looong time to make sure that it doesn't go away if the mouse is
-    // still over the widget.
-    await tester.pump(const Duration(days: 1));
-    await tester.pumpAndSettle();
-    expect(find.text(tooltipText), findsOneWidget);
-
-    await gesture.moveTo(Offset.zero);
-    await tester.pump();
-
-    // Wait for it to disappear.
-    await tester.pump(showDuration);
-    await tester.pumpAndSettle();
-    expect(find.text(tooltipText), findsNothing);
-  });
-
   testWidgets('Does tooltip contribute semantics', (WidgetTester tester) async {
     final SemanticsTester semantics = SemanticsTester(tester);
 
@@ -621,7 +500,7 @@ void main() {
 
     expect(semantics, hasSemantics(expected, ignoreTransform: true, ignoreRect: true));
 
-    // Before using "as dynamic" in your code, see note at the top of the file.
+    // before using "as dynamic" in your code, see note top of file
     (key.currentState as dynamic).ensureTooltipVisible(); // this triggers a rebuild of the semantics because the tree changes
 
     await tester.pump(const Duration(seconds: 2)); // faded in, show timer started (and at 0.0)