Removed ElementModelWriter due to it being unused.

Change-Id: Ib2bb8b877e23fdff884bd03b208ea4d077c6e927
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/437120
Commit-Queue: Paul Berry <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>
Reviewed-by: Paul Berry <[email protected]>

Author: fshcheglov

pkg/analyzer/lib/src/summary2/bundle_writer.dart

@@ -868,75 +868,6 @@ class BundleWriterResult {
   BundleWriterResult({required this.resolutionBytes});
 }
 
-class ElementModelWriter {
-  final BundleWriter _bundleWriter;
-
-  ElementModelWriter(BundleWriter bundleWriter) : _bundleWriter = bundleWriter;
-
-  void writeBool(bool value) {
-    _bundleWriter._sink.writeBool(value);
-  }
-
-  void writeElement(Element? element) {
-    _bundleWriter._resolutionSink.writeElement(element);
-  }
-
-  // TODO(scheglov): Deduplicate parameter writing implementation.
-  void writeFormalParameterFragment(FormalParameterFragmentImpl element) {
-    _bundleWriter._writeParameterElement(element);
-  }
-
-  void writeFormalParameterFragments(
-    List<FormalParameterFragmentImpl> fragments,
-  ) {
-    writeList(fragments, writeFormalParameterFragment);
-  }
-
-  void writeFragmentId(FragmentImpl fragment) {
-    _bundleWriter._writeFragmentId(fragment);
-  }
-
-  void writeFragmentName(FragmentImpl fragment) {
-    _bundleWriter._writeFragmentName(fragment);
-  }
-
-  void writeInt64(int value) {
-    _bundleWriter._sink.writeInt64(value);
-  }
-
-  void writeList<T>(List<T> elements, void Function(T) writeElement) {
-    _bundleWriter._writeList(elements, writeElement);
-  }
-
-  void writeMetadata(MetadataImpl metadata) {
-    _bundleWriter._resolutionSink._writeMetadata(metadata);
-  }
-
-  void writeNodeList(List<AstNode> nodes) {
-    _bundleWriter._resolutionSink._writeNodeList(nodes);
-  }
-
-  void writeOptionalNode(Expression? node) {
-    _bundleWriter._resolutionSink._writeOptionalNode(node);
-  }
-
-  void writeOptionalStringReference(String? value) {
-    _bundleWriter._sink._writeOptionalStringReference(value);
-  }
-
-  void writeResolutionOffset() {
-    _bundleWriter._writeResolutionOffset();
-  }
-
-  void writeTopLevelInferenceError(TopLevelInferenceError? error) {
-    _bundleWriter._sink._writeTopLevelInferenceError(error);
-  }
-
-  void writeType(DartType? type) {
-    _bundleWriter._resolutionSink.writeType(type);
-  }
-}
-
 class ResolutionSink extends _SummaryDataWriter {
   final _BundleWriterReferences _references;
   final _LocalElementIndexer localElements = _LocalElementIndexer();