Remove deprecations from TextSelectionHandleControls instances (#124611)

Moves to a two-step deprecation process for context menus, avoiding immediate breaking changes.

packages/flutter/lib/src/cupertino/desktop_text_selection.dart

@@ -80,11 +80,11 @@ class CupertinoDesktopTextSelectionControls extends TextSelectionControls {
   }
 }
 
+// TODO(justinmc): Deprecate this after TextSelectionControls.buildToolbar is
+// deleted, when users should migrate back to
+// cupertinoDesktopTextSelectionControls.
+// See https://github.com/flutter/flutter/pull/124262
 /// Text selection handle controls that follow MacOS design conventions.
-@Deprecated(
-  'Use `cupertinoDesktopTextSelectionControls` instead. '
-  'This feature was deprecated after v3.3.0-0.5.pre.',
-)
 final TextSelectionControls cupertinoDesktopTextSelectionHandleControls =
     _CupertinoDesktopTextSelectionHandleControls();
 

packages/flutter/lib/src/cupertino/text_selection.dart

@@ -184,11 +184,10 @@ class CupertinoTextSelectionControls extends TextSelectionControls {
   }
 }
 
+// TODO(justinmc): Deprecate this after TextSelectionControls.buildToolbar is
+// deleted, when users should migrate back to cupertinoTextSelectionControls.
+// See https://github.com/flutter/flutter/pull/124262
 /// Text selection handle controls that follow iOS design conventions.
-@Deprecated(
-  'Use `cupertinoTextSelectionControls` instead. '
-  'This feature was deprecated after v3.3.0-0.5.pre.',
-)
 final TextSelectionControls cupertinoTextSelectionHandleControls =
     CupertinoTextSelectionHandleControls();
 

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

@@ -95,12 +95,11 @@ class DesktopTextSelectionControls extends TextSelectionControls {
   }
 }
 
+// TODO(justinmc): Deprecate this after TextSelectionControls.buildToolbar is
+// deleted, when users should migrate back to desktopTextSelectionControls.
+// See https://github.com/flutter/flutter/pull/124262
 /// Desktop text selection handle controls that loosely follow Material design
 /// conventions.
-@Deprecated(
-  'Use `desktopTextSelectionControls` instead. '
-  'This feature was deprecated after v3.3.0-0.5.pre.',
-)
 final TextSelectionControls desktopTextSelectionHandleControls =
     _DesktopTextSelectionHandleControls();
 

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

@@ -308,11 +308,10 @@ class _TextSelectionHandlePainter extends CustomPainter {
   }
 }
 
+// TODO(justinmc): Deprecate this after TextSelectionControls.buildToolbar is
+// deleted, when users should migrate back to materialTextSelectionControls.
+// See https://github.com/flutter/flutter/pull/124262
 /// Text selection handle controls that follow the Material Design specification.
-@Deprecated(
-  'Use `materialTextSelectionControls` instead. '
-  'This feature was deprecated after v3.3.0-0.5.pre.',
-)
 final TextSelectionControls materialTextSelectionHandleControls = MaterialTextSelectionHandleControls();
 
 /// Text selection controls that follow the Material Design specification.