[stubs] Remove unused StoreGlobalViaContextStub.

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index 09dc377338632ad6a7c67cb01955d6a3504b505f..a03a5f691924ea6341c5c616a04a0cba2ceabc09 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -82,7 +82,6 @@ class PlatformInterfaceDescriptor;
   V(ArgumentAdaptor)                      \
   V(ApiCallback)                          \
   V(ApiGetter)                            \
-  V(StoreGlobalViaContext)                \
   V(MathPowTagged)                        \
   V(MathPowInteger)                       \
   V(GrowArrayElements)                    \
@@ -577,17 +576,6 @@ class RegExpConstructResultDescriptor : public CallInterfaceDescriptor {
   DECLARE_DESCRIPTOR(RegExpConstructResultDescriptor, CallInterfaceDescriptor)
 };
 
-
-class StoreGlobalViaContextDescriptor : public CallInterfaceDescriptor {
- public:
-  DEFINE_PARAMETERS(kSlot, kValue)
-  DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(StoreGlobalViaContextDescriptor,
-                                               CallInterfaceDescriptor)
-
-  static const Register SlotRegister();
-  static const Register ValueRegister();
-};
-
 class CopyFastSmiOrObjectElementsDescriptor : public CallInterfaceDescriptor {
  public:
   DEFINE_PARAMETERS(kObject)