Update features.dart (#102766)

packages/flutter_tools/lib/src/features.dart

@@ -90,7 +90,6 @@ const Feature flutterMacOSDesktopFeature = Feature(
   name: 'support for desktop on macOS',
   configSetting: 'enable-macos-desktop',
   environmentOverride: 'FLUTTER_MACOS',
-  extraHelpText: 'Newer beta versions are available on the beta channel.',
   master: FeatureChannelSetting(
     available: true,
   ),
@@ -107,7 +106,6 @@ const Feature flutterLinuxDesktopFeature = Feature(
   name: 'support for desktop on Linux',
   configSetting: 'enable-linux-desktop',
   environmentOverride: 'FLUTTER_LINUX',
-  extraHelpText: 'Newer beta versions are available on the beta channel.',
   master: FeatureChannelSetting(
     available: true,
   ),

packages/flutter_tools/test/general.shard/features_test.dart

@@ -90,15 +90,13 @@ void main() {
     testWithoutContext('Flutter macOS desktop help string', () {
       expect(flutterMacOSDesktopFeature.generateHelpMessage(),
       'Enable or disable support for desktop on macOS. '
-      'This setting will take effect on the master, beta, and stable channels. '
-      'Newer beta versions are available on the beta channel.');
+      'This setting will take effect on the master, beta, and stable channels.');
     });
 
     testWithoutContext('Flutter Linux desktop help string', () {
       expect(flutterLinuxDesktopFeature.generateHelpMessage(),
       'Enable or disable support for desktop on Linux. '
-      'This setting will take effect on the master, beta, and stable channels. '
-      'Newer beta versions are available on the beta channel.');
+      'This setting will take effect on the master, beta, and stable channels.');
     });
 
     testWithoutContext('Flutter Windows desktop help string', () {