jfs: remove unnecessary oom message

Fixes scripts/checkpatch.pl warning:
WARNING: Possible unnecessary 'out of memory' message

Remove it can help us save a bit of memory.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>

fs/jfs/jfs_imap.c

@@ -103,10 +103,8 @@ int diMount(struct inode *ipimap)
 	 */
 	/* allocate the in-memory inode map control structure. */
 	imap = kmalloc(sizeof(struct inomap), GFP_KERNEL);
-	if (imap == NULL) {
-		jfs_err("diMount: kmalloc returned NULL!");
+	if (imap == NULL)
 		return -ENOMEM;
-	}
 
 	/* read the on-disk inode map control structure. */