staging: rtl8723bs: remove unused enumerations

These enumerations and their values are never used anywhere else; remove
them.

Signed-off-by: Nikolay Kulikov <nikolayof23@gmail.com>
Link: https://patch.msgid.link/20260727-rtl8723bs_rmove_enums-v1-1-7974aab6c86e@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>