cleanup comments of sl_mem_detach()

servers/slapd/sl_malloc.c

@@ -80,13 +80,6 @@ sl_mem_detach(
 {
 	/* separate from context */
 	ldap_pvt_thread_pool_setkey( ctx, sl_mem_init, NULL, NULL );
-
-	/* The code used to try to use realloc to shrink the region.
-	 * This is unsafe, since realloc may return a different block
-	 * of memory from what was passed in, and the region contains
-	 * pointers that reference itself. After realloc, these pointers
-	 * are invalid, and crashes result.
-	 */
 }
 
 void *