[runtime] First step to sanitize regexp literal creation.

src/crankshaft/x64/lithium-x64.cc

Index: src/crankshaft/x64/lithium-x64.cc
diff --git a/src/crankshaft/x64/lithium-x64.cc b/src/crankshaft/x64/lithium-x64.cc
index 97a56a489d34eff71501b4d2766516bef3051bee..47bd0ae76eb7dd97970d82ccc00e24056b23519e 100644
--- a/src/crankshaft/x64/lithium-x64.cc
+++ b/src/crankshaft/x64/lithium-x64.cc
@@ -2472,13 +2472,6 @@ LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoRegExpLiteral(HRegExpLiteral* instr) {
-  LOperand* context = UseFixed(instr->context(), rsi);
-  LRegExpLiteral* result = new(zone()) LRegExpLiteral(context);
-  return MarkAsCall(DefineFixed(result, rax), instr);
-}
-
-
 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
   DCHECK(argument_count_ == 0);
   allocator_->MarkAsOsrEntry();