[dart2wasm] Remove unused annotations and field

Change-Id: I83a9bd6a8aedb5312381b975c49e287ee76bc11b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/501141
Reviewed-by: Srujan Gaddam <srujzs@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>

pkg/dart2wasm/lib/sync_star.dart

@@ -129,9 +129,6 @@ class SyncStarStateMachineCodeGenerator extends StateMachineCodeGenerator {
   late final ClassInfo suspendStateInfo =
       translator.classInfo[translator.suspendStateClass]!;
 
-  late final ClassInfo syncStarIterableInfo =
-      translator.classInfo[translator.syncStarIterableClass]!;
-
   late final ClassInfo syncStarIteratorInfo =
       translator.classInfo[translator.syncStarIteratorClass]!;
 

sdk/lib/_internal/wasm/lib/js_string.dart

@@ -239,7 +239,6 @@ final class JSStringImpl extends js.JSExternWrapper
   }
 
   @override
-  @pragma('dyn-module:callable')
   @pragma('wasm:pure-function')
   String operator +(String other) {
     return JSStringImpl.fromRefUnchecked(

sdk/lib/_internal/wasm/lib/record_patch.dart

@@ -12,7 +12,6 @@ abstract class Record {
   _RecordType get _masqueradedRecordRuntimeType;
   _RecordType get _recordRuntimeType;
 
-  @pragma('dyn-module:can-be-overridden')
   bool _checkRecordType(
     WasmArray<_Type> types,
     ImmutableWasmArray<String> names,

sdk/lib/_internal/wasm/lib/type.dart

@@ -581,7 +581,6 @@ class _RecordType extends _Type {
   _Type get _asNullable => _RecordType(names, fieldTypes, true);
 
   @override
-  @pragma('dyn-module:callable')
   @pragma("wasm:static-dispatch")
   bool _checkInstance(Object o) {
     if (!_isRecordClassId(ClassID.getID(o))) return false;
@@ -1953,7 +1952,6 @@ _Type _getActualRuntimeType(Object object) {
 }
 
 @pragma("wasm:prefer-inline")
-@pragma('dyn-module:callable')
 _Type _getActualRuntimeTypeNullable(Object? object) =>
     object == null ? _literal<Null>() : _getActualRuntimeType(object);