Remove: TabBarTheme: Not needed M3 vs M2 indicator size values, Flutter defaults to same values

Author: rydmike

lib/src/flex_sub_themes.dart

@@ -7835,6 +7835,7 @@ abstract final class FlexSubThemes {
     /// variant.
     final TabAlignment? tabAlignment,
 
+    // TODO(rydmike): Open issue, in 3.27 always linear even if elastic used.
     /// Specifies the animation behavior of the tab indicator in a [TabBar].
     ///
     /// If not defined, the tab indicator will animate linearly if
@@ -7915,8 +7916,7 @@ abstract final class FlexSubThemes {
       unselectedLabelStyle: unselectedLabelStyle,
       unselectedLabelColor: unselectedLabelColor,
       //
-      indicatorSize: indicatorSize ??
-          (useM3 ? TabBarIndicatorSize.label : TabBarIndicatorSize.tab),
+      indicatorSize: indicatorSize,
       indicatorAnimation: indicatorAnimation,
       indicatorColor: indicatorColor,
       indicator: (indicatorWeight != null || indicatorTopRadius != null)