staging: rtl8723bs: os_dep: remove two set but not used variables

staging: rtl8723bs: os_dep: remove two set but not used variables

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

drivers/staging/rtl8723bs//os_dep/osdep_service.c: In function 'rtw_buf_free':
drivers/staging/rtl8723bs//os_dep/osdep_service.c:321:6: warning:
 variable 'ori_len' set but not used [-Wunused-but-set-variable]
drivers/staging/rtl8723bs//os_dep/ioctl_linux.c: In function 'rtw_ioctl_wext_private':
drivers/staging/rtl8723bs//os_dep/ioctl_linux.c:4915:6: warning:
 variable 'num_priv' set but not used [-Wunused-but-set-variable]

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190726140959.15008-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>