Remove the compiled_transitions flag and cleanup the unused code.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index bc581d837d42ae13ffb754d1dc349a6ceb124cd7..84d9b023b3a237b36aee866c75b1ed5119e20d76 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -2310,48 +2310,6 @@ class ElementsTransitionAndStoreStub : public HydrogenCodeStub {
 };
 
 
-// TODO(bmeurer) Remove this when compiled transitions is enabled
-class ElementsTransitionAndStorePlatformStub : public PlatformCodeStub {
- public:
-  ElementsTransitionAndStorePlatformStub(ElementsKind from,
-                                         ElementsKind to,
-                                         bool is_jsarray,
-                                         StrictModeFlag strict_mode,
-                                         KeyedAccessStoreMode store_mode)
-      : from_(from),
-        to_(to),
-        is_jsarray_(is_jsarray),
-        strict_mode_(strict_mode),
-        store_mode_(store_mode) {}
-
- private:
-  class FromBits:       public BitField<ElementsKind,        0, 8> {};
-  class ToBits:         public BitField<ElementsKind,        8, 8> {};
-  class IsJSArrayBits:  public BitField<bool,                16, 1> {};
-  class StrictModeBits: public BitField<StrictModeFlag,      17, 1> {};
-  class StoreModeBits: public BitField<KeyedAccessStoreMode, 18, 4> {};
-
-  Major MajorKey() { return ElementsTransitionAndStore; }
-  int MinorKey() {
-    return FromBits::encode(from_) |
-        ToBits::encode(to_) |
-        IsJSArrayBits::encode(is_jsarray_) |
-        StrictModeBits::encode(strict_mode_) |
-        StoreModeBits::encode(store_mode_);
-  }
-
-  void Generate(MacroAssembler* masm);
-
-  ElementsKind from_;
-  ElementsKind to_;
-  bool is_jsarray_;
-  StrictModeFlag strict_mode_;
-  KeyedAccessStoreMode store_mode_;
-
-  DISALLOW_COPY_AND_ASSIGN(ElementsTransitionAndStorePlatformStub);
-};
-
-
 class StoreArrayLiteralElementStub : public PlatformCodeStub {
  public:
   StoreArrayLiteralElementStub()