Eliminate the need for code delete events in CPU profiler.

src/cpu-profiler-inl.h

Index: src/cpu-profiler-inl.h
diff --git a/src/cpu-profiler-inl.h b/src/cpu-profiler-inl.h
index 938b632214e2134f33d69f76cb5365c6c7e27927..4982197cabaf418006431f15d107fa29e6af8f2a 100644
--- a/src/cpu-profiler-inl.h
+++ b/src/cpu-profiler-inl.h
@@ -51,11 +51,6 @@ void CodeMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
 }
 
 
-void CodeDeleteEventRecord::UpdateCodeMap(CodeMap* code_map) {
-  code_map->DeleteCode(start);
-}
-
-
 void SharedFunctionInfoMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
   code_map->MoveCode(from, to);
 }