Remove unused pc descriptor types.

runtime/vm/stub_code_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 1774 matching lines @@
   __ Push(R5);
   __ PushObject(Object::null_object(), PP);  // Space for result.
   __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
   __ Pop(R0);
   __ Pop(R5);
   __ LeaveStubFrame();
   __ br(R0);
 }
 
 
-// R5: Contains Smi 0 (need to preserve a GC-safe value for the lazy compile
-// stub).
-// R4: Contains an arguments descriptor.
-void StubCode::GenerateClosureCallBreakpointStub(Assembler* assembler) {
-  __ EnterStubFrame();
-  __ Push(R5);
-  __ Push(R4);
-  __ PushObject(Object::null_object(), PP);  // Space for result.
-  __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
-  __ Pop(R0);
-  __ Pop(R4);
-  __ Pop(R5);
-  __ LeaveStubFrame();
-  __ br(R0);
-}
-
-
 void StubCode::GenerateRuntimeCallBreakpointStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ PushObject(Object::null_object(), PP);  // Space for result.
   __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
   __ Pop(R0);
   __ LeaveStubFrame();
   __ br(R0);
 }
 
 // Called only from unoptimized code. All relevant registers have been saved.
@@ skipping 347 matching lines @@
 // Result:
 //  R1: entry point.
 void StubCode::GenerateMegamorphicLookupStub(Assembler* assembler) {
   EmitMegamorphicLookup(assembler, R0, R1, R1);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64