[stubs] Remove unused StoreGlobalViaContextStub.

src/arm64/interface-descriptors-arm64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/arm64/interface-descriptors-arm64.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/interface-descriptors.h"
 
@@ skipping 28 matching lines @@
 const Register StoreDescriptor::NameRegister() { return x2; }
 const Register StoreDescriptor::ValueRegister() { return x0; }
 const Register StoreDescriptor::SlotRegister() { return x4; }
 
 const Register StoreWithVectorDescriptor::VectorRegister() { return x3; }
 
 const Register StoreTransitionDescriptor::SlotRegister() { return x4; }
 const Register StoreTransitionDescriptor::VectorRegister() { return x3; }
 const Register StoreTransitionDescriptor::MapRegister() { return x5; }
 
-const Register StoreGlobalViaContextDescriptor::SlotRegister() { return x2; }
-const Register StoreGlobalViaContextDescriptor::ValueRegister() { return x0; }
-
-
 const Register StringCompareDescriptor::LeftRegister() { return x1; }
 const Register StringCompareDescriptor::RightRegister() { return x0; }
 
 const Register ApiGetterDescriptor::HolderRegister() { return x0; }
 const Register ApiGetterDescriptor::CallbackRegister() { return x3; }
 
 const Register MathPowTaggedDescriptor::exponent() { return x11; }
 
 
 const Register MathPowIntegerDescriptor::exponent() { return x12; }
@@ skipping 413 matching lines @@
       x1,  // the JSGeneratorObject to resume
       x2   // the resume mode (tagged)
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64