Remove mk file parser variables that are no longer required by system/bt

* Removed BLUETOOTH_HCI_USE_MCT
* Removed BOARD_BLUETOOTH_BDROID_HCILP_INCLUDED

Bug: 35203653, 34951912
Test: Code compilation, no user visible effects
Change-Id: Ic575d3a0fac541da3e70543d0f144ea4792bc058
1 file changed