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

src/compiler/arm/code-generator-arm.cc

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index 35876621913ad674a4671448f7d9aba98c51bc3e..13ce301560d0be7883981a0037661a05211f4171 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -533,18 +533,6 @@
                        MemoryChunk::kPointersFromHereAreInterestingMask, ne,
                        ool->entry());
       __ bind(ool->exit());
-      break;
-    }
-    case kArchStackSlot: {
-      FrameOffset offset =
-          frame_access_state()->GetFrameOffset(i.InputInt32(0));
-      Register base;
-      if (offset.from_stack_pointer()) {
-        base = sp;
-      } else {
-        base = fp;
-      }
-      __ add(i.OutputRegister(0), base, Operand(offset.offset()));
       break;
     }
     case kArmAdd: