Refactoring InterfaceDescriptors away from code-stubs.h

src/arm64/code-stubs-arm64.h

Index: src/arm64/code-stubs-arm64.h
diff --git a/src/arm64/code-stubs-arm64.h b/src/arm64/code-stubs-arm64.h
index cb4738d32a77e2ab6caecf1800fe52d0998c6aa6..e11cb7a55f38c4fc5308a8b451fea58a783f708a 100644
--- a/src/arm64/code-stubs-arm64.h
+++ b/src/arm64/code-stubs-arm64.h
@@ -454,20 +454,6 @@ class StringCompareStub: public PlatformCodeStub {
                                             Label* chars_not_equal);
 };
 
-
-class PlatformInterfaceDescriptor {
- public:
-  explicit PlatformInterfaceDescriptor(
-      TargetAddressStorageMode storage_mode)
-      : storage_mode_(storage_mode) { }
-
-  TargetAddressStorageMode storage_mode() { return storage_mode_; }
-
- private:
-  TargetAddressStorageMode storage_mode_;
-};
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_CODE_STUBS_ARM64_H_