staging/rtl8723bs/core: remove inactive initialization

The allocation address of the psta pointer variable is first performed
in the function, no initialization assignment is required, and no
invalid pointer will appear.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Li zeming <zeming@nfschina.com>
Link: https://lore.kernel.org/r/20220802012513.2824-1-zeming@nfschina.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>