Remove deprecated RenderEditable.onSelectionChanged (#98582)

packages/flutter/lib/src/rendering/editable.dart

@@ -30,17 +30,6 @@ const EdgeInsets _kFloatingCaretSizeIncrease = EdgeInsets.symmetric(horizontal:
 // The corner radius of the floating cursor in pixels.
 const Radius _kFloatingCaretRadius = Radius.circular(1.0);
 
-/// Signature for the callback that reports when the user changes the selection
-/// (including the cursor location).
-///
-/// Used by [RenderEditable.onSelectionChanged].
-@Deprecated(
-  'Signature of a deprecated class method, '
-  'textSelectionDelegate.userUpdateTextEditingValue. '
-  'This feature was deprecated after v1.26.0-17.2.pre.',
-)
-typedef SelectionChangedHandler = void Function(TextSelection selection, RenderEditable renderObject, SelectionChangedCause cause);
-
 /// Signature for the callback that reports when the caret location changes.
 ///
 /// Used by [RenderEditable.onCaretChanged].
@@ -265,11 +254,6 @@ class RenderEditable extends RenderBox with RelayoutWhenSystemFontsChangeMixin,
     double textScaleFactor = 1.0,
     TextSelection? selection,
     required ViewportOffset offset,
-    @Deprecated(
-      'Uses the textSelectionDelegate.userUpdateTextEditingValue instead. '
-      'This feature was deprecated after v1.26.0-17.2.pre.',
-    )
-    this.onSelectionChanged,
     this.onCaretChanged,
     this.ignorePointer = false,
     bool readOnly = false,
@@ -501,14 +485,6 @@ class RenderEditable extends RenderBox with RelayoutWhenSystemFontsChangeMixin,
       ],
     );
   }
-  /// Called when the selection changes.
-  ///
-  /// If this is null, then selection changes will be ignored.
-  @Deprecated(
-    'Uses the textSelectionDelegate.userUpdateTextEditingValue instead. '
-    'This feature was deprecated after v1.26.0-17.2.pre.',
-  )
-  SelectionChangedHandler? onSelectionChanged;
 
   double? _textLayoutLastMaxWidth;
   double? _textLayoutLastMinWidth;
@@ -731,7 +707,6 @@ class RenderEditable extends RenderBox with RelayoutWhenSystemFontsChangeMixin,
   }
 
   void _setTextEditingValue(TextEditingValue newValue, SelectionChangedCause cause) {
-    textSelectionDelegate.textEditingValue = newValue;
     textSelectionDelegate.userUpdateTextEditingValue(newValue, cause);
   }
 
@@ -751,28 +726,12 @@ class RenderEditable extends RenderBox with RelayoutWhenSystemFontsChangeMixin,
         extentOffset: math.min(nextSelection.extentOffset, textLength),
       );
     }
-    _handleSelectionChange(nextSelection, cause);
     _setTextEditingValue(
       textSelectionDelegate.textEditingValue.copyWith(selection: nextSelection),
       cause,
     );
   }
 
-  void _handleSelectionChange(
-    TextSelection nextSelection,
-    SelectionChangedCause cause,
-  ) {
-    // Changes made by the keyboard can sometimes be "out of band" for listening
-    // components, so always send those events, even if we didn't think it
-    // changed. Also, focusing an empty field is sent as a selection change even
-    // if the selection offset didn't change.
-    final bool focusingEmpty = nextSelection.baseOffset == 0 && nextSelection.extentOffset == 0 && !hasFocus;
-    if (nextSelection == selection && cause != SelectionChangedCause.keyboard && !focusingEmpty) {
-      return;
-    }
-    onSelectionChanged?.call(nextSelection, this, cause);
-  }
-
   @override
   void markNeedsPaint() {
     super.markNeedsPaint();

packages/flutter/lib/src/services/text_input.dart

@@ -965,17 +965,6 @@ mixin TextSelectionDelegate {
   /// Gets the current text input.
   TextEditingValue get textEditingValue;
 
-  /// Indicates that the user has requested the delegate to replace its current
-  /// text editing state with [value].
-  ///
-  /// The new [value] is treated as user input and thus may subject to input
-  /// formatting.
-  @Deprecated(
-    'Use the userUpdateTextEditingValue instead. '
-    'This feature was deprecated after v1.26.0-17.2.pre.',
-  )
-  set textEditingValue(TextEditingValue value) {}
-
   /// Indicates that the user has requested the delegate to replace its current
   /// text editing state with [value].
   ///

packages/flutter/test/rendering/editable_gesture_test.dart

@@ -32,7 +32,6 @@ void main() {
         extentOffset: 3,
         affinity: TextAffinity.upstream,
       ),
-      onSelectionChanged: (_, __, ___) { },
     );
     editable.layout(BoxConstraints.loose(const Size(1000.0, 1000.0)));