Clean up type parameters in comments

pkg/analyzer/lib/src/generated/utilities_general.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.generated.utilities_general;
 
 import 'dart:collection';
 import 'dart:developer' show UserTag;
 
 export 'package:front_end/src/base/jenkins_smi_hash.dart' show JenkinsSmiHash;
@@ skipping 110 matching lines @@
 
   /**
    * Make this the current tag for the isolate, and return the previous tag.
    */
   PerformanceTag makeCurrent();
 
   /**
    * Make this the current tag for the isolate, run [f], and restore the
    * previous tag. Returns the result of invoking [f].
    */
-  dynamic/*=E*/ makeCurrentWhile/*<E>*/(dynamic/*=E*/ f());
+  E makeCurrentWhile<E>(E f());
 
   /**
    * Reset the total time tracked by all [PerformanceTag]s to zero.
    */
   static void reset() {
     for (_PerformanceTagImpl tag in _PerformanceTagImpl.all) {
       tag.stopwatch.reset();
     }
   }
 }
@@ skipping 45 matching lines @@
       return current;
     }
     _PerformanceTagImpl previous = current;
     previous.stopwatch.stop();
     stopwatch.start();
     current = this;
     userTag.makeCurrent();
     return previous;
   }
 
-  dynamic/*=E*/ makeCurrentWhile/*<E>*/(dynamic/*=E*/ f()) {
+  E makeCurrentWhile<E>(E f()) {
     PerformanceTag prevTag = makeCurrent();
     try {
       return f();
     } finally {
       prevTag.makeCurrent();
     }
   }
 }