[turbofan] only use two gaps

src/compiler/register-allocator.h

Index: src/compiler/register-allocator.h
diff --git a/src/compiler/register-allocator.h b/src/compiler/register-allocator.h
index d7dd1b7358246462f2a9474399b23e23225bebd3..7835bd608052da34bf032b2f775768c30f8c641f 100644
--- a/src/compiler/register-allocator.h
+++ b/src/compiler/register-allocator.h
@@ -564,10 +564,6 @@ class RegisterAllocator FINAL : public ZoneObject {
 
   void SetLiveRangeAssignedRegister(LiveRange* range, int reg);
 
-  // Return parallel move that should be used to connect ranges split at the
-  // given position.
-  ParallelMove* GetConnectingParallelMove(LifetimePosition pos);
-
   // Return the block which contains give lifetime position.
   const InstructionBlock* GetInstructionBlock(LifetimePosition pos);