Revert "Second attempt at introducing a premonomorphic state in the call"

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 9f47f8f0721c478c10907636784ed856fc36753f..2c82a9f324bec1ec74ac474b02b517c841ec8f09 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -8175,9 +8175,6 @@ class TypeFeedbackInfo: public Struct {
   // The object that indicates an uninitialized cache.
   static inline Handle<Object> UninitializedSentinel(Isolate* isolate);
 
-  // The object that indicates a cache in pre-monomorphic state.
-  static inline Handle<Object> PremonomorphicSentinel(Isolate* isolate);
-
   // The object that indicates a megamorphic state.
   static inline Handle<Object> MegamorphicSentinel(Isolate* isolate);