Staging: rtl8723au: hal: Remove unused macros

The macros PlatformProcessHCICommands and PlatformTxBTQueuedPackets
are not used anywhere in the kernel so remove them.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>