net: ieee802154: 6lowpan: remove redundant pointers 'fq' and 'net'

Pointers fq and net are being assigned but are never used hence they
are redundant and can be removed.

Cleans up clang warnings:
warning: variable 'fq' set but not used [-Wunused-but-set-variable]
warning: variable 'net' set but not used [-Wunused-but-set-variable]

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Stefan Schmidt <[e-mail]>

net/ieee802154/6lowpan/reassembly.c

···
 static void lowpan_frag_init(struct inet_frag_queue *q, const void *a)
 {
 	const struct frag_lowpan_compare_key *key = a;
-	struct lowpan_frag_queue *fq;
-
-	fq = container_of(q, struct lowpan_frag_queue, q);
 
 	BUILD_BUG_ON(sizeof(*key) > sizeof(q->key));
 	memcpy(&q->key, key, sizeof(*key));
···
 {
 	struct inet_frag_queue *frag = from_timer(frag, t, timer);
 	struct frag_queue *fq;
-	struct net *net;
 
 	fq = container_of(frag, struct frag_queue, q);
-	net = container_of(fq->q.net, struct net, ieee802154_lowpan.frags);
 
 	spin_lock(&fq->q.lock);