Deprecate the generated element library and clean up imports

pkg/analysis_server/lib/src/services/completion/dart/imported_reference_contributor.dart

Index: pkg/analysis_server/lib/src/services/completion/dart/imported_reference_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/dart/imported_reference_contributor.dart b/pkg/analysis_server/lib/src/services/completion/dart/imported_reference_contributor.dart
index abed73526ac331bc787715444e405184c6609bba..6a8c367aa39e07ea48c39108f1eda4908a231305 100644
--- a/pkg/analysis_server/lib/src/services/completion/dart/imported_reference_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/completion/dart/imported_reference_contributor.dart
@@ -10,12 +10,30 @@ import 'package:analysis_server/src/provisional/completion/dart/completion_dart.
 import 'package:analysis_server/src/services/completion/dart/completion_manager.dart';
 import 'package:analysis_server/src/services/completion/dart/local_library_contributor.dart';
 import 'package:analysis_server/src/services/completion/dart/optype.dart';
-import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 
 import '../../../protocol_server.dart'
     show CompletionSuggestion, CompletionSuggestionKind;
 
+List<String> hiddenNamesIn(ImportElement importElem) {
+  for (NamespaceCombinator combinator in importElem.combinators) {
+    if (combinator is HideElementCombinator) {
+      return combinator.hiddenNames;
+    }
+  }
+  return null;
+}
+
+List<String> showNamesIn(ImportElement importElem) {
+  for (NamespaceCombinator combinator in importElem.combinators) {
+    if (combinator is ShowElementCombinator) {
+      return combinator.shownNames;
+    }
+  }
+  return null;
+}
+
 /**
  * A contributor for calculating suggestions for imported top level members.
  */
@@ -69,21 +87,3 @@ class ImportedReferenceContributor extends DartCompletionContributor {
     return visitor.suggestions;
   }
 }
-
-List<String> showNamesIn(ImportElement importElem) {
-  for (NamespaceCombinator combinator in importElem.combinators) {
-    if (combinator is ShowElementCombinator) {
-      return combinator.shownNames;
-    }
-  }
-  return null;
-}
-
-List<String> hiddenNamesIn(ImportElement importElem) {
-  for (NamespaceCombinator combinator in importElem.combinators) {
-    if (combinator is HideElementCombinator) {
-      return combinator.hiddenNames;
-    }
-  }
-  return null;
-}