net: qualcomm: rmnet: Remove set but not used variable 'cmd'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c: In function 'rmnet_map_do_flow_control':
drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c:23:36: warning:
variable 'cmd' set but not used [-Wunused-but-set-variable]
struct rmnet_map_control_command *cmd;

'cmd' not used anymore now, should also be removed.

Signed-off-by: YueHaibing <[e-mail]>
Acked-by: Subash Abhinov Kasiviswanathan <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c

···
 				    struct rmnet_port *port,
 				    int enable)
 {
-	struct rmnet_map_control_command *cmd;
 	struct rmnet_endpoint *ep;
 	struct net_device *vnd;
 	u8 mux_id;
 	int r;
 
 	mux_id = RMNET_MAP_GET_MUX_ID(skb);
-	cmd = RMNET_MAP_GET_CMD_START(skb);
 
 	if (mux_id >= RMNET_MAX_LOGICAL_EP) {
 		kfree_skb(skb);