[turbofan] Fix includes for JSOperatorBuilder.

src/type-feedback-vector-inl.h

Index: src/type-feedback-vector-inl.h
diff --git a/src/type-feedback-vector-inl.h b/src/type-feedback-vector-inl.h
index 2c971cac5d93aaef5e10017364d5fc8927d5ba67..4812ca50899393129418150f20df780ea9701d70 100644
--- a/src/type-feedback-vector-inl.h
+++ b/src/type-feedback-vector-inl.h
@@ -78,12 +78,6 @@ TypeFeedbackMetadata* TypeFeedbackVector::metadata() const {
 }
 
 
-// static
-int TypeFeedbackVector::GetIndex(FeedbackVectorSlot slot) {
-  return kReservedIndexCount + slot.ToInt();
-}
-
-
 // Conversion from an integer index to either a slot or an ic slot. The caller
 // should know what kind she expects.
 // static