[stubs] Remove unused StoreGlobalViaContextStub.

src/x87/interface-descriptors-x87.cc

Index: src/x87/interface-descriptors-x87.cc
diff --git a/src/x87/interface-descriptors-x87.cc b/src/x87/interface-descriptors-x87.cc
index 85b26ca1b038661fd8660316654ba23069939280..4f993c881e41391f9e9eb8ff42050983987b6106 100644
--- a/src/x87/interface-descriptors-x87.cc
+++ b/src/x87/interface-descriptors-x87.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; }