Pins cleanup

Marlin/src/pins/linux/pins_RAMPS_LINUX.h

Marlin/src/pins/mega/pins_MEGACONTROLLER.h

Marlin/src/pins/mega/pins_MEGATRONICS.h

Marlin/src/pins/mega/pins_MEGATRONICS_2.h

Marlin/src/pins/mega/pins_MEGATRONICS_3.h

Marlin/src/pins/rambo/pins_EINSY_RAMBO.h

Marlin/src/pins/rambo/pins_EINSY_RETRO.h

Marlin/src/pins/rambo/pins_MINIRAMBO.h

Marlin/src/pins/rambo/pins_RAMBO.h

Marlin/src/pins/ramps/pins_3DRAG.h

Marlin/src/pins/ramps/pins_AZTEEG_X3.h

Marlin/src/pins/ramps/pins_AZTEEG_X3_PRO.h

Marlin/src/pins/ramps/pins_BAM_DICE_DUE.h

Marlin/src/pins/ramps/pins_BQ_ZUM_MEGA_3D.h

Marlin/src/pins/ramps/pins_FORMBOT_RAPTOR.h

Marlin/src/pins/ramps/pins_FORMBOT_RAPTOR2.h

Marlin/src/pins/ramps/pins_FORMBOT_TREX2PLUS.h

Marlin/src/pins/ramps/pins_FORMBOT_TREX3.h

Marlin/src/pins/ramps/pins_MKS_BASE.h

Marlin/src/pins/ramps/pins_RAMPS.h