RDMA/qib: Unneeded variable ret

Fix the below warning reported by coccicheck:

drivers/infiniband/hw/qib/qib_file_ops.c:1792:5-8: Unneeded variable:
"ret". Return "0" on line 1876

Link: https://lore.kernel.org/r/20190716172924.GA12241@hari-Inspiron-1545
Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/qib/qib_file_ops.c

@@ -1789,7 +1789,6 @@ static void unlock_expected_tids(struct qib_ctxtdata *rcd)
 
 static int qib_close(struct inode *in, struct file *fp)
 {
-	int ret = 0;
 	struct qib_filedata *fd;
 	struct qib_ctxtdata *rcd;
 	struct qib_devdata *dd;
@@ -1873,7 +1872,7 @@ static int qib_close(struct inode *in, struct file *fp)
 
 bail:
 	kfree(fd);
-	return ret;
+	return 0;
 }
 
 static int qib_ctxt_info(struct file *fp, struct qib_ctxt_info __user *uinfo)