Removed CheckboxListTile accentColor dependency (#76877)

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

@@ -26,10 +26,10 @@ import 'theme_data.dart';
 /// those of the same name on [ListTile].
 ///
 /// The [selected] property on this widget is similar to the [ListTile.selected]
-/// property, but the color used is that described by [activeColor], if any,
-/// defaulting to the accent color of the current [Theme]. No effort is made to
-/// coordinate the [selected] state and the [value] state; to have the list tile
-/// appear selected when the checkbox is checked, pass the same value to both.
+/// property, but the color used is [activeColor], if it's non-null.
+/// No effort is made to coordinate the [selected] state and the
+/// [value] state; to have the list tile appear selected when the
+/// checkbox is checked, pass the same value to both.
 ///
 /// The checkbox is shown on the right by default in left-to-right languages
 /// (i.e. the trailing edge). This can be changed using [controlAffinity]. The
@@ -314,7 +314,8 @@ class CheckboxListTile extends StatelessWidget {
 
   /// The color to use when this checkbox is checked.
   ///
-  /// Defaults to accent color of the current [Theme].
+  /// If this property is null, then the checkbox's default is used, which is
+  /// [ThemeData.toggleableActiveColor].
   final Color? activeColor;
 
   /// The color to use for the check icon when this checkbox is checked.
@@ -430,9 +431,8 @@ class CheckboxListTile extends StatelessWidget {
         trailing = control;
         break;
     }
+
     return MergeSemantics(
-      child: ListTileTheme.merge(
-        selectedColor: activeColor ?? Theme.of(context).accentColor,
       child: ListTile(
         leading: leading,
         title: title,
@@ -449,7 +449,6 @@ class CheckboxListTile extends StatelessWidget {
         selectedTileColor: selectedTileColor,
         tileColor: tileColor,
       ),
-      ),
     );
   }
 }