lightnvm: remove unused 'geo' variable

A previous commit correctly removed set-but-not-read variables, but
this left two new variables now unused. Kill them.

Fixes: ba6f7da ("lightnvm: remove set but not used variables 'data_len' and 'rq_len'")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/lightnvm/pblk-read.c

@@ -417,8 +417,6 @@ static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
 
 int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
 {
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
 	struct nvm_rq rqd;
 	int ret = NVM_IO_OK;