[turbofan] Unify referencing of stack slots

src/compiler/osr.cc

Index: src/compiler/osr.cc
diff --git a/src/compiler/osr.cc b/src/compiler/osr.cc
index 6c4c49de7981657e86ef4c253668ea4cc16a6b7c..663cf57808715cd5dad5fe99dfa9bc9071a34982 100644
--- a/src/compiler/osr.cc
+++ b/src/compiler/osr.cc
@@ -328,8 +328,6 @@ void OsrHelper::SetupFrame(Frame* frame) {
   // The optimized frame will subsume the unoptimized frame. Do so by reserving
   // the first spill slots.
   frame->ReserveSpillSlots(UnoptimizedFrameSlots());
-  // The frame needs to be adjusted by the number of unoptimized frame slots.
-  frame->SetOsrStackSlotCount(static_cast<int>(UnoptimizedFrameSlots()));
 }
 
 }  // namespace compiler