Consolidate RecordWriteFromCode and RecordWriteForEvacuationFromCode.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 4b4c3d4daf38aec7c8c3e836e18852664cbd58b1..d51264dca9f22dcad218a4ca328a70a800580e7c 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -1029,14 +1029,6 @@ ExternalReference ExternalReference::
 
 
 ExternalReference ExternalReference::
-    incremental_evacuation_record_write_function(Isolate* isolate) {
-  return ExternalReference(Redirect(
-      isolate,
-      FUNCTION_ADDR(IncrementalMarking::RecordWriteForEvacuationFromCode)));
-}
-
-
-ExternalReference ExternalReference::
     store_buffer_overflow_function(Isolate* isolate) {
   return ExternalReference(Redirect(
       isolate,