[vm,dyn_modules] Remove unused library dependencies from bytecode

Fixes #61362
TEST=ci

Change-Id: I1e15b100a9d5f486addce11e85ea6d69389a6bb7
Cq-Include-Trybots: luci.dart.try:vm-aot-dyn-linux-debug-x64-try,vm-aot-dyn-linux-product-x64-try,vm-dyn-linux-debug-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/446101
Reviewed-by: Tess Strickland <[email protected]>
Commit-Queue: Alexander Markov <[email protected]>

Author: alexmarkov

pkg/dart2bytecode/lib/bytecode_generator.dart

@@ -348,7 +348,7 @@ class BytecodeGenerator extends RecursiveVisitor {
       flags |= ClassDeclaration.hasSourcePositionsFlag;
       position = library.fileOffset;
     }
-    Annotations annotations = getLibraryAnnotations(library);
+    Annotations annotations = getAnnotations(library.annotations);
     if (annotations.object != null) {
       flags |= ClassDeclaration.hasAnnotationsFlag;
       if (annotations.hasPragma) {
@@ -441,67 +441,6 @@ class BytecodeGenerator extends RecursiveVisitor {
     return new Annotations(functionDecl, hasPragma);
   }
 
-  // Insert annotations for library and its dependencies into the
-  // annotations section. Returns annotations for the library only.
-  // Bytecode reader will implicitly find library dependencies by reading
-  // an extra object after reading library annotations.
-  Annotations getLibraryAnnotations(Library library) {
-    Annotations annotations = getAnnotations(library.annotations);
-    final bool emitDependencies =
-        options.emitAnnotations && library.dependencies.isNotEmpty;
-    if (annotations.object == null && !emitDependencies) {
-      return annotations;
-    }
-
-    // We need to emit both annotations and dependencies objects, appending
-    // null if an object is missing.
-    if (annotations.object == null) {
-      final annotationsDecl = new AnnotationsDeclaration(null);
-      bytecodeComponent.annotations.add(annotationsDecl);
-      annotations = new Annotations(annotationsDecl, false);
-    }
-    if (!emitDependencies) {
-      bytecodeComponent.annotations.add(new AnnotationsDeclaration(null));
-      return annotations;
-    }
-
-    // Create a constant object representing library dependencies.
-    // These objects are used by dart:mirrors and vm-service implementation.
-    final deps = <Constant>[];
-    for (var dependency in library.dependencies) {
-      final dependencyName = dependency.name;
-      final prefix = dependencyName != null
-          ? StringConstant(dependencyName)
-          : NullConstant();
-      final showNames = dependency.combinators
-          .where((c) => c.isShow)
-          .expand((c) => c.names)
-          .map((name) => StringConstant(name))
-          .toList();
-      final hideNames = dependency.combinators
-          .where((c) => c.isHide)
-          .expand((c) => c.names)
-          .map((name) => StringConstant(name))
-          .toList();
-      final depAnnots = dependency.annotations.map(_getConstant).toList();
-      deps.add(ListConstant(const DynamicType(), <Constant>[
-        StringConstant(dependency.targetLibrary.importUri.toString()),
-        BoolConstant(dependency.isExport),
-        BoolConstant(dependency.isDeferred),
-        prefix,
-        ListConstant(const DynamicType(), showNames),
-        ListConstant(const DynamicType(), hideNames),
-        ListConstant(const DynamicType(), depAnnots),
-      ]));
-    }
-    final ObjectHandle dependenciesObject =
-        objectTable.getHandle(ListConstant(const DynamicType(), deps))!;
-    final dependenciesDecl = new AnnotationsDeclaration(dependenciesObject);
-    bytecodeComponent.annotations.add(dependenciesDecl);
-
-    return annotations;
-  }
-
   FieldDeclaration getFieldDeclaration(Field field, Code? initializer) {
     int flags = 0;
     Constant? value;