ui: Remove "Noto Color Emoji", broken on iOS (and maybe Android?)

lib/widgets/app.dart

@@ -80,19 +80,6 @@ class ZulipApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = ThemeData(
-      // This sets up the font fallback for normal text that
-      // may contain an emoji, where it will use any font from the "sans-serif"
-      // group to fetch the glyphs and fallback to "Noto Color Emoji" for emojis.
-      //
-      // Note that specifiying only "Noto Color Emoji" in the fallback list,
-      // Flutter tries to use it to draw even the non emoji characters
-      // which leads to broken text rendering.
-      fontFamilyFallback: [
-        // …since apparently iOS doesn't support 'sans-serif', use this instead:
-        //   https://github.com/flutter/flutter/issues/63507#issuecomment-1698504425
-        if (Theme.of(context).platform == TargetPlatform.iOS) '.AppleSystemUIFont' else 'sans-serif',
-        'Noto Color Emoji',
-      ],
       // This applies Material 3's color system to produce a palette of
       // appropriately matching and contrasting colors for use in a UI.
       // The Zulip brand color is a starting point, but doesn't end up as

pubspec.yaml

@@ -109,7 +109,6 @@ flutter:
   assets:
     - assets/Source_Code_Pro/LICENSE.md
     - assets/Source_Sans_3/LICENSE.md
-    - assets/Noto_Color_Emoji/LICENSE
 
   fonts:
     # Zulip's custom icons.  To use or edit, see class ZulipIcons.
@@ -129,8 +128,4 @@ flutter:
         - asset: assets/Source_Sans_3/SourceSans3VF-Italic.otf
           style: italic
 
-    - family: Noto Color Emoji
-      fonts:
-        - asset: assets/Noto_Color_Emoji/Noto-COLRv1.ttf
-
     # If adding a font, remember to account for its license in lib/licenses.dart.