Revert of [turbofan] Add support for copy-on-write element stores.

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index 1460b3c86562d86c87c25362f34585d60057fce4..430090c2473e5a41acc72bae2014da579e14c9cc 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -55,7 +55,6 @@
   V(ConstructStub)                     \
   V(ConstructTrampoline)               \
   V(RegExpConstructResult)             \
-  V(CopyFixedArray)                    \
   V(TransitionElementsKind)            \
   V(AllocateHeapNumber)                \
   V(AllocateFloat32x4)                 \
@@ -649,12 +648,6 @@
   static const Register ValueRegister();
 };
 
-class CopyFixedArrayDescriptor : public CallInterfaceDescriptor {
- public:
-  DEFINE_PARAMETERS(kSource)
-  DECLARE_DEFAULT_DESCRIPTOR(CopyFixedArrayDescriptor, CallInterfaceDescriptor,
-                             kParameterCount)
-};
 
 class TransitionElementsKindDescriptor : public CallInterfaceDescriptor {
  public: