Remove the Polymer support from the analyzer and analysis_server packages.

pkg/analysis_server/test/protocol_server_test.dart

Index: pkg/analysis_server/test/protocol_server_test.dart
diff --git a/pkg/analysis_server/test/protocol_server_test.dart b/pkg/analysis_server/test/protocol_server_test.dart
index aaf58b50f1d6540a8c7d436507e3a7284c836066..265eaaad15c7ccfc86f0a8338b7a2fdc598eb977 100644
--- a/pkg/analysis_server/test/protocol_server_test.dart
+++ b/pkg/analysis_server/test/protocol_server_test.dart
@@ -443,9 +443,6 @@ class EnumTest {
       engine.ElementKind.HTML: ElementKind.UNKNOWN,
       engine.ElementKind.IMPORT: ElementKind.UNKNOWN,
       engine.ElementKind.NAME: ElementKind.UNKNOWN,
-      engine.ElementKind.POLYMER_ATTRIBUTE: ElementKind.UNKNOWN,
-      engine.ElementKind.POLYMER_TAG_DART: ElementKind.UNKNOWN,
-      engine.ElementKind.POLYMER_TAG_HTML: ElementKind.UNKNOWN,
       engine.ElementKind.UNIVERSE: ElementKind.UNKNOWN
     });
   }