Remove unused pc descriptor types.

runtime/vm/stub_code_arm.cc

Index: runtime/vm/stub_code_arm.cc
diff --git a/runtime/vm/stub_code_arm.cc b/runtime/vm/stub_code_arm.cc
index e7e6a66830ca9e97363e397e1e1425264575a605..afe30f72a4e073ec76bb6b5409f4da1b60938478 100644
--- a/runtime/vm/stub_code_arm.cc
+++ b/runtime/vm/stub_code_arm.cc
@@ -1731,21 +1731,6 @@ void StubCode::GenerateICCallBreakpointStub(Assembler* assembler) {
 }
 
 
-// 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();
-  __ LoadImmediate(R0, reinterpret_cast<intptr_t>(Object::null()));
-  // Preserve arguments descriptor and make room for result.
-  __ PushList((1 << R0) | (1 << R4) | (1 << R5));
-  __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
-  __ PopList((1 << R0) | (1 << R4) | (1 << R5));
-  __ LeaveStubFrame();
-  __ bx(R0);
-}
-
-
 void StubCode::GenerateRuntimeCallBreakpointStub(Assembler* assembler) {
   __ EnterStubFrame();
   __ LoadImmediate(R0, reinterpret_cast<intptr_t>(Object::null()));