navigator: only poll for position
navigator: only poll for position

We don't need to poll for vehicle commands, we will get them anyway by
doing orb_check. Also, the polling for them wasn't implemented correctly
anyway.

mcgill-robotics/Firmware,krbeverx/Firmware,dagar/Firmware,acfloria/Firmware,dagar/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,jlecoeur/Firmware,PX4/Firmware,dagar/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,PX4/Firmware,PX4/Firmware,acfloria/Firmware,dagar/Firmware,Aerotenna/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,mcgill-robotics/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,Aerotenna/Firmware,krbeverx/Firmware,Aerotenna/Firmware,acfloria/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,krbeverx/Firmware,jlecoeur/Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,Aerotenna/Firmware,Aerotenna/Firmware,dagar/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,jlecoeur/Firmware,PX4/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,acfloria/Firmware,krbeverx/Firmware