Tools/check_submodules.sh: remove unnecessary verbose message
Tools/check_submodules.sh: remove unnecessary verbose message

This was printed for all submodules.

PX4/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,dagar/Firmware,acfloria/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,dagar/Firmware,PX4/Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,Aerotenna/Firmware,krbeverx/Firmware,acfloria/Firmware,dagar/Firmware,krbeverx/Firmware,Aerotenna/Firmware,dagar/Firmware,acfloria/Firmware,dagar/Firmware,acfloria/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,acfloria/Firmware,krbeverx/Firmware,krbeverx/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,PX4/Firmware,mje-nz/PX4-Firmware