Fix 'Unused local variable' hints in analyzer and analysis_server.

pkg/analysis_server/lib/src/domain_execution.dart

Index: pkg/analysis_server/lib/src/domain_execution.dart
diff --git a/pkg/analysis_server/lib/src/domain_execution.dart b/pkg/analysis_server/lib/src/domain_execution.dart
index d4c371ae73263723c841a16da803eb503f4505ae..f176c080aab5d5710aef3bbb572f518e27871982 100644
--- a/pkg/analysis_server/lib/src/domain_execution.dart
+++ b/pkg/analysis_server/lib/src/domain_execution.dart
@@ -177,8 +177,6 @@ class ExecutionDomainHandler implements RequestHandler {
       => server.contextDirectoryManager.isInAnalysisRoot(filePath);
 
   void _reportCurrentFileStatus() {
-    Map<String, List<String>> dartToHtml = new HashMap<String, List<String>>();
-    Map<String, List<String>> htmlToDart = new HashMap<String, List<String>>();
     for (AnalysisContext context in server.getAnalysisContexts()) {
       List<Source> librarySources = context.librarySources;
       List<Source> clientSources = context.launchableClientLibrarySources;