Remove specialized raw Cell and Map allocators.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index deb1e2616fa25092c930a9e29834450c09f34705..96cda586b7c9ea464bc7b1fd39d38c160b34e207 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -2091,18 +2091,6 @@ class Heap {
     return (pretenure == TENURED) ? preferred_old_space : NEW_SPACE;
   }
 
-  // Allocate an uninitialized object in map space.  The behavior is identical
-  // to Heap::AllocateRaw(size_in_bytes, MAP_SPACE), except that (a) it doesn't
-  // have to test the allocation space argument and (b) can reduce code size
-  // (since both AllocateRaw and AllocateRawMap are inlined).
-  MUST_USE_RESULT inline MaybeObject* AllocateRawMap();
-
-  // Allocate an uninitialized object in the simple cell space.
-  MUST_USE_RESULT inline MaybeObject* AllocateRawCell();
-
-  // Allocate an uninitialized object in the global property cell space.
-  MUST_USE_RESULT inline MaybeObject* AllocateRawPropertyCell();
-
   // Allocate an uninitialized fixed array.
   MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(
       int length, PretenureFlag pretenure);