udf: Drop pointless IS_IMMUTABLE and IS_APPEND check

udf_setsize() checks for IS_IMMUTABLE and IS_APPEND flags. This is
however pointless as UDF does not have capability to store these flags
and never allows to set them. Furthermore this is the only place in UDF
code that was actually checking these flags. Remove the pointless check.
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/inode.c

@@ -1247,8 +1247,6 @@ int udf_setsize(struct inode *inode, loff_t newsize)
 	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
 	      S_ISLNK(inode->i_mode)))
 		return -EINVAL;
-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
-		return -EPERM;
 
 	filemap_invalidate_lock(inode->i_mapping);
 	iinfo = UDF_I(inode);