Revert of Vector ICs: platform support for vector-based stores.

src/ic/arm64/stub-cache-arm64.cc

Index: src/ic/arm64/stub-cache-arm64.cc
diff --git a/src/ic/arm64/stub-cache-arm64.cc b/src/ic/arm64/stub-cache-arm64.cc
index eb82f2af868b73b13f785e47272c746b38211d79..ecd7fe1534e1305d89416376a1dc4f6bc7452eb2 100644
--- a/src/ic/arm64/stub-cache-arm64.cc
+++ b/src/ic/arm64/stub-cache-arm64.cc
@@ -111,14 +111,8 @@
   // extra3 don't conflict with the vector and slot registers, which need
   // to be preserved for a handler call or miss.
   if (IC::ICUseVector(ic_kind)) {
-    Register vector, slot;
-    if (ic_kind == Code::STORE_IC || ic_kind == Code::KEYED_STORE_IC) {
-      vector = VectorStoreICDescriptor::VectorRegister();
-      slot = VectorStoreICDescriptor::SlotRegister();
-    } else {
-      vector = LoadWithVectorDescriptor::VectorRegister();
-      slot = LoadWithVectorDescriptor::SlotRegister();
-    }
+    Register vector = LoadWithVectorDescriptor::VectorRegister();
+    Register slot = LoadWithVectorDescriptor::SlotRegister();
     DCHECK(!AreAliased(vector, slot, scratch, extra, extra2, extra3));
   }
 #endif