Remove obsolete instruction HOuterContext.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index dd5465398e5199846a65bf189dfbb64d4aed8a5c..f99f0f597a692fdb9bb0cfcff73744107a12324a 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -3762,14 +3762,6 @@ void LCodeGen::DoContext(LContext* instr) {
 }
 
 
-void LCodeGen::DoOuterContext(LOuterContext* instr) {
-  Register context = ToRegister(instr->context());
-  Register result = ToRegister(instr->result());
-  __ mov(result,
-         Operand(context, Context::SlotOffset(Context::PREVIOUS_INDEX)));
-}
-
-
 void LCodeGen::DoDeclareGlobals(LDeclareGlobals* instr) {
   ASSERT(ToRegister(instr->context()).is(esi));
   __ push(esi);  // The context is the first argument.