Remove deprecated Megamorphic stub.

runtime/vm/stub_code_arm.cc

 // Copyright (c) 2013, 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_ARM)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 1438 matching lines @@
       assembler, 3, kInlineCacheMissHandlerThreeArgsRuntimeEntry);
 }
 
 
 void StubCode::GenerateClosureCallInlineCacheStub(Assembler* assembler) {
   GenerateNArgsCheckInlineCacheStub(
       assembler, 1, kInlineCacheMissHandlerOneArgRuntimeEntry);
 }
 
 
-void StubCode::GenerateMegamorphicCallStub(Assembler* assembler) {
-  GenerateNArgsCheckInlineCacheStub(
-      assembler, 1, kInlineCacheMissHandlerOneArgRuntimeEntry);
-}
-
-
 // Intermediary stub between a static call and its target. ICData contains
 // the target function and the call count.
 // R5: ICData
 void StubCode::GenerateZeroArgsUnoptimizedStaticCallStub(Assembler* assembler) {
   GenerateUsageCounterIncrement(assembler, R6);
 #if defined(DEBUG)
   { Label ok;
     // Check that the IC data array has NumArgsTested() == 0.
     // 'NumArgsTested' is stored in the least significant bits of 'state_bits'.
     __ ldr(R6, FieldAddress(R5, ICData::state_bits_offset()));
@@ skipping 377 matching lines @@
   const Register right = R0;
   __ ldr(left, Address(SP, 1 * kWordSize));
   __ ldr(right, Address(SP, 0 * kWordSize));
   GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM