Update devtools_launcher.dart (#85995)

diff --git a/packages/flutter_tools/lib/src/devtools_launcher.dart b/packages/flutter_tools/lib/src/devtools_launcher.dart
index 2d1630c..529ab86 100644
--- a/packages/flutter_tools/lib/src/devtools_launcher.dart
+++ b/packages/flutter_tools/lib/src/devtools_launcher.dart
@@ -16,10 +16,8 @@
 import 'persistent_tool_state.dart';
 import 'resident_runner.dart';
 
-/// An implementation of the devtools launcher that uses the server package.
-///
-/// This is implemented in `isolated/` to prevent the flutter_tool from needing
-/// a devtools dependency in google3.
+/// An implementation of the devtools launcher that uses `pub global activate` to
+/// start a server instance.
 class DevtoolsServerLauncher extends DevtoolsLauncher {
   DevtoolsServerLauncher({
     @required Platform platform,