Drop unused labels.

lib/libc/stdlib/merge.c

@@ -150,7 +150,7 @@ mergesort(base, nmemb, size, cmp)
 	    			sense = 0;
 	    		}
 	    		if (!big) {	/* here i = 0 */
-LINEAR:	    			while ((b += size) < t && cmp(q, b) >sense)
+				while ((b += size) < t && cmp(q, b) >sense)
 	    				if (++i == 6) {
 	    					big = 1;
 	    					goto EXPONENTIAL;
@@ -171,7 +171,7 @@ EXPONENTIAL:	    		for (i = size; ; i <<= 1)
 	    					goto FASTCASE;
 	    				} else
 	    					b = p;
-SLOWCASE:	    		while (t > b+size) {
+				while (t > b+size) {
 	    				i = (((t - b) / size) >> 1) * size;
 	    				if ((*cmp)(q, p = b + i) <= sense)
 	    					t = p;