Removed unused variables

* Follow up to d1a957e.

src/map/atcommand.c

@@ -7773,7 +7773,6 @@ ACMD_FUNC(mutearea)
 ACMD_FUNC(rates)
 {
 	char buf[CHAT_SIZE_MAX];
-	int base_exp_rate = 0, job_exp_rate = 0;
 
 	nullpo_ret(sd);
 	memset(buf, '\0', sizeof(buf));