Merge pull request #4693 from thinkyhead/rc_pins_cleanup_aug23

Marlin/Conditionals_LCD.h

Marlin/Conditionals_post.h

Marlin/example_configurations/Hephestos/Configuration.h

Marlin/example_configurations/Hephestos_2/Configuration.h

Marlin/pins_3DRAG.h

Marlin/pins_5DPRINT.h

Marlin/pins_99.h

Marlin/pins_A4JP.h

Marlin/pins_AZTEEG_X3_PRO.h

Marlin/pins_BQ_ZUM_MEGA_3D.h

Marlin/pins_BRAINWAVE.h

Marlin/pins_BRAINWAVE_PRO.h

Marlin/pins_CHEAPTRONIC.h

Marlin/pins_CNCONTROLS_11.h

Marlin/pins_CNCONTROLS_12.h

Marlin/pins_ELEFU_3.h

Marlin/pins_GEN3_MONOLITHIC.h

Marlin/pins_GEN3_PLUS.h

Marlin/pins_GEN6.h

Marlin/pins_GEN7_12.h