More clean-up after getting common protocol classes

pkg/analysis_server/lib/src/plugin/request_converter.dart

Index: pkg/analysis_server/lib/src/plugin/request_converter.dart
diff --git a/pkg/analysis_server/lib/src/plugin/request_converter.dart b/pkg/analysis_server/lib/src/plugin/request_converter.dart
index 92cbc48642889a3139463d3fd8636431654899b9..6f7fe8ab0c17370c3020fe7b33606b1dc42e2c36 100644
--- a/pkg/analysis_server/lib/src/plugin/request_converter.dart
+++ b/pkg/analysis_server/lib/src/plugin/request_converter.dart
@@ -46,11 +46,6 @@ class RequestConverter {
 
   plugin.AnalysisUpdateContentParams convertAnalysisUpdateContentParams(
       server.AnalysisUpdateContentParams params) {
-    Map<String, dynamic> serverOverlays = params.files;
-    Map<String, dynamic> pluginOverlays = <String, dynamic>{};
-    for (String file in serverOverlays.keys) {
-      pluginOverlays[file] = serverOverlays[file];
-    }
-    return new plugin.AnalysisUpdateContentParams(pluginOverlays);
+    return new plugin.AnalysisUpdateContentParams(params.files);
   }
 }