IOP: Fix Wunused-variable warnings.

pcsx2/IopCounters.cpp

@@ -497,10 +497,6 @@ void psxRcntUpdate()
 		//if( psxCounters[i].count >= psxCounters[i].target ) _rcntTestTarget( i );
 	}
 
-
-	const s32 difference = psxRegs.cycle - psxCounters[6].sCycleT;
-	s32 c = psxCounters[6].CycleT;
-
 	const u32 spu2_delta = (psxRegs.cycle - lClocks) % 768;
 	psxCounters[6].sCycleT = psxRegs.cycle;
 	psxCounters[6].CycleT = psxCounters[6].rate - spu2_delta;