kill superfluous returns at the end of void functions

e2fsprogs/old_e2fsprogs/blkid/devname.c

@@ -131,7 +131,6 @@ set_pri:
 		pri = BLKID_PRI_MD;
 	if (dev)
 		dev->bid_pri = pri;
-	return;
 }
 
 #define PROC_PARTITIONS "/proc/partitions"

e2fsprogs/old_e2fsprogs/blkid/devno.c

@@ -122,7 +122,6 @@ static void scan_dir(char *dir_name, dev_t devno, struct dir_list **list,
 		}
 	}
 	closedir(dir);
-	return;
 }
 
 /* Directories where we will try to search for device numbers */

e2fsprogs/old_e2fsprogs/blkid/read.c

@@ -410,7 +410,6 @@ void blkid_read_cache(blkid_cache cache)
 	return;
 errout:
 	close(fd);
-	return;
 }
 
 #ifdef TEST_PROGRAM