9p: remove useless assignment

There is no use of pointer 'fid' before the next assignment.

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 5bbb5a0..af7d531 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -861,7 +861,7 @@
 		return finish_no_open(file, res);
 
 	err = 0;
-	fid = NULL;
+
 	v9ses = v9fs_inode2v9ses(dir);
 	perm = unixmode2p9mode(v9ses, mode);
 	fid = v9fs_create(v9ses, dir, dentry, NULL, perm,