gfs2: Remove redundant NULL check before kfree

kfree on NULL pointer is a no-op.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Author: Minghao Chi

fs/gfs2/file.c

@@ -1066,8 +1066,7 @@ static ssize_t gfs2_file_buffered_write(struct kiocb *iocb,
 		gfs2_glock_dq(gh);
 out_uninit:
 	gfs2_holder_uninit(gh);
-	if (statfs_gh)
-		kfree(statfs_gh);
+	kfree(statfs_gh);
 	from->count = orig_count - written;
 	return written ? written : ret;
 }