scsi: qedf: Remove unused 'num_handled' variable

clang with W=1 reports:

drivers/scsi/qedf/qedf_main.c:2227:6: error: variable
  'num_handled' set but not used [-Werror,-Wunused-but-set-variable]
        int num_handled = 0;
            ^
This variable is not used so remove it.
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20230330203444.1842425-1-trix@redhat.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qedf/qedf_main.c

@@ -2224,7 +2224,6 @@ static bool qedf_process_completions(struct qedf_fastpath *fp)
 	u16 prod_idx;
 	struct fcoe_cqe *cqe;
 	struct qedf_io_work *io_work;
-	int num_handled = 0;
 	unsigned int cpu;
 	struct qedf_ioreq *io_req = NULL;
 	u16 xid;
@@ -2247,7 +2246,6 @@ static bool qedf_process_completions(struct qedf_fastpath *fp)
 
 	while (new_cqes) {
 		fp->completions++;
-		num_handled++;
 		cqe = &que->cq[que->cq_cons_idx];
 
 		comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &