[stubs] Remove unused StoreGlobalViaContextStub.

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index 2628b9fb6fd2c7b7dea84c0f76801b05f5eedb76..85d267a2eb9e685e50e3e24d4d379fb1a21227bd 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -183,22 +183,6 @@ void StoreNamedTransitionDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(len, registers);
 }
 
-void StoreGlobalViaContextDescriptor::InitializePlatformIndependent(
-    CallInterfaceDescriptorData* data) {
-  // kSlot, kValue
-  MachineType machine_types[] = {MachineType::Int32(),
-                                 MachineType::AnyTagged()};
-  data->InitializePlatformIndependent(arraysize(machine_types), 0,
-                                      machine_types);
-}
-
-void StoreGlobalViaContextDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {SlotRegister(), ValueRegister()};
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
-
 void StringCompareDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {LeftRegister(), RightRegister()};