cw1200: wsm: Remove 'dummy' variables

cw1200: wsm: Remove 'dummy' variables

They're never read, so there is no reason for them to exist.

They just cause the compiler to complain.

Fixes the following W=1 kernel build warning(s):

 drivers/net/wireless/st/cw1200/wsm.c: In function ‘wsm_ba_timeout_indication’:
 drivers/net/wireless/st/cw1200/wsm.c:1033:5: warning: variable ‘dummy2’ set but not used [-Wunused-but-set-variable]
 drivers/net/wireless/st/cw1200/wsm.c:1031:6: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable]

Cc: Solomon Peachy <pizza@shaftnet.org>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200819072402.3085022-14-lee.jones@linaro.org