dart2js: remove spurious semicolon.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.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.
 
 part of dart2js.js_emitter;
 
 
 class OldEmitter implements Emitter {
   final Compiler compiler;
   final CodeEmitterTask task;
@@ skipping 1455 matching lines @@
 
     emitStaticFunctions(task.outputStaticLists[mainOutputUnit]);
 
     List<ClassElement> classes = task.outputClassLists[mainOutputUnit];
     if (classes != null) {
       for (ClassElement element in classes) {
         generateClass(element, getElementDescriptor(element));
       }
     }
 
-    if (compiler.enableMinification) {
-      mainOutput.add(';');
-    }
-
     Iterable<LibraryElement> libraries =
         task.outputLibraryLists[mainOutputUnit];
     if (libraries == null) libraries = [];
     emitLibraries(libraries);
     emitTypedefs();
     emitMangledNames(mainOutput);
 
     checkEverythingEmitted(elementDescriptors.keys);
 
     CodeBuffer libraryBuffer = new CodeBuffer();
@@ skipping 607 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }