remove outdated comment

Author: renefloor

packages/stream_core_flutter/lib/src/components/common/stream_skeleton_loading.dart

@@ -255,17 +255,6 @@ class _StreamSkeletonLoadingThemeDefaults extends StreamSkeletonLoadingThemeData
 
   late final StreamColorScheme _colorScheme = context.streamColorScheme;
 
-  // The shimmer package uses BlendMode.srcATop which replaces child pixels
-  // with the gradient. The highlight color is brightness-aware: light mode
-  // uses a semi-transparent white overlay, dark mode uses the deepest chrome
-  // shade to create a subtle darkening sweep.
-  //
-  // NOTE: Component theme defaults should generally avoid depending on
-  // [Theme.brightnessOf] and instead rely solely on [StreamColorScheme]
-  // semantics. This is an exception because the chrome surface hierarchy
-  // inverts between light and dark modes, so no single semantic color pair
-  // produces the correct base→highlight contrast in both brightnesses.
-
   @override
   Color get baseColor => _colorScheme.backgroundSurfaceStrong;