Revert of [turbofan] Add the StackSlot operator to turbofan.

src/compiler/machine-operator.cc

Index: src/compiler/machine-operator.cc
diff --git a/src/compiler/machine-operator.cc b/src/compiler/machine-operator.cc
index ae05ef753ce03f9f1a329d06d19f6a694c8fa7d5..bec48d769f6928fec94912f328f14a5fb155a5b9 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -91,10 +91,6 @@
   return OpParameter<CheckedStoreRepresentation>(op);
 }
 
-MachineRepresentation StackSlotRepresentationOf(Operator const* op) {
-  DCHECK_EQ(IrOpcode::kStackSlot, op->opcode());
-  return OpParameter<MachineRepresentation>(op);
-}
 
 #define PURE_OP_LIST(V)                                                       \
   V(Word32And, Operator::kAssociative | Operator::kCommutative, 2, 0, 1)      \
@@ -285,18 +281,6 @@
   MACHINE_TYPE_LIST(LOAD)
 #undef LOAD
 
-#define STACKSLOT(Type)                                                       \
-  struct StackSlot##Type##Operator final                                      \
-      : public Operator1<MachineRepresentation> {                             \
-    StackSlot##Type##Operator()                                               \
-        : Operator1<MachineRepresentation>(                                   \
-              IrOpcode::kStackSlot, Operator::kNoThrow, "StackSlot", 0, 0, 0, \
-              1, 0, 0, MachineType::Type().representation()) {}               \
-  };                                                                          \
-  StackSlot##Type##Operator kStackSlot##Type;
-  MACHINE_TYPE_LIST(STACKSLOT)
-#undef STACKSLOT
-
 #define STORE(Type)                                                            \
   struct Store##Type##Operator : public Operator1<StoreRepresentation> {       \
     explicit Store##Type##Operator(WriteBarrierKind write_barrier_kind)        \
@@ -397,16 +381,6 @@
   return nullptr;
 }
 
-const Operator* MachineOperatorBuilder::StackSlot(MachineRepresentation rep) {
-#define STACKSLOT(Type)                              \
-  if (rep == MachineType::Type().representation()) { \
-    return &cache_.kStackSlot##Type;                 \
-  }
-  MACHINE_TYPE_LIST(STACKSLOT)
-#undef STACKSLOT
-  UNREACHABLE();
-  return nullptr;
-}
 
 const Operator* MachineOperatorBuilder::Store(StoreRepresentation store_rep) {
   switch (store_rep.representation()) {