Revert of Use a WeakCell in the CallIC type vector.

src/x64/interface-descriptors-x64.cc

Index: src/x64/interface-descriptors-x64.cc
diff --git a/src/x64/interface-descriptors-x64.cc b/src/x64/interface-descriptors-x64.cc
index 1ca0c858778f0acc96b5cb5d509460449f7f4c48..f97c6c76720b797c52440780e8746bf2d6c586b6 100644
--- a/src/x64/interface-descriptors-x64.cc
+++ b/src/x64/interface-descriptors-x64.cc
@@ -101,19 +101,7 @@
 void CreateAllocationSiteDescriptor::Initialize(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {rsi, rbx, rdx};
-  Representation representations[] = {Representation::Tagged(),
-                                      Representation::Tagged(),
-                                      Representation::Smi()};
-  data->Initialize(arraysize(registers), registers, representations);
-}
-
-
-void CreateWeakCellDescriptor::Initialize(CallInterfaceDescriptorData* data) {
-  Register registers[] = {rsi, rbx, rdx, rdi};
-  Representation representations[] = {
-      Representation::Tagged(), Representation::Tagged(), Representation::Smi(),
-      Representation::Tagged()};
-  data->Initialize(arraysize(registers), registers, representations);
+  data->Initialize(arraysize(registers), registers, NULL);
 }