[stubs] Remove unused StoreGlobalViaContextStub.

src/ia32/interface-descriptors-ia32.cc

Index: src/ia32/interface-descriptors-ia32.cc
diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index 220484c1bf1c4d727ee3bc75a0af4bc63779f053..b8c10e3ac6d6e97c0c2a2e416741cbb5aa661cf1 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -40,15 +40,9 @@ const Register StoreDescriptor::SlotRegister() { return edi; }
 const Register StoreWithVectorDescriptor::VectorRegister() { return ebx; }
 
 const Register StoreTransitionDescriptor::SlotRegister() { return no_reg; }
-
 const Register StoreTransitionDescriptor::VectorRegister() { return ebx; }
-
 const Register StoreTransitionDescriptor::MapRegister() { return edi; }
 
-const Register StoreGlobalViaContextDescriptor::SlotRegister() { return ebx; }
-const Register StoreGlobalViaContextDescriptor::ValueRegister() { return eax; }
-
-
 const Register StringCompareDescriptor::LeftRegister() { return edx; }
 const Register StringCompareDescriptor::RightRegister() { return eax; }