Revert "Resolve metadata on library tags"

sdk/lib/_internal/compiler/implementation/compiler.dart

Index: sdk/lib/_internal/compiler/implementation/compiler.dart
diff --git a/sdk/lib/_internal/compiler/implementation/compiler.dart b/sdk/lib/_internal/compiler/implementation/compiler.dart
index 843a0624fa2092933fc0a4c852f00ae732ca9658..802214c2d84f0b7e6c4277d95c02490845e9d6dd 100644
--- a/sdk/lib/_internal/compiler/implementation/compiler.dart
+++ b/sdk/lib/_internal/compiler/implementation/compiler.dart
@@ -1060,7 +1060,6 @@ abstract class Compiler implements DiagnosticListener {
     // Elements required by enqueueHelpers are global dependencies
     // that are not pulled in by a particular element.
     backend.enqueueHelpers(enqueuer.resolution, globalDependencies);
-    resolveLibraryMetadata();
     processQueue(enqueuer.resolution, main);
     enqueuer.resolution.logSummary(log);
 
@@ -1128,17 +1127,6 @@ abstract class Compiler implements DiagnosticListener {
     }
   }
 
-  // Resolves metadata on library elements.  This is necessary in order to
-  // resolve metadata classes referenced only from metadata on library tags.
-  // TODO(ahe): Figure out how to do this lazily.
-  void resolveLibraryMetadata() {
-    for (LibraryElement library in libraries.values) {
-      for (MetadataAnnotation metadata in library.metadata) {
-        metadata.ensureResolved(this);
-      }
-    }
-  }
-
   void processQueue(Enqueuer world, Element main) {
     world.nativeEnqueuer.processNativeClasses(libraries.values);
     if (main != null) {