Removed unused configuration options.

Marlin/Configuration.h

Marlin/src/config/default/Configuration.h

Marlin/src/config/examples/AliExpress/CL-260/Configuration.h

Marlin/src/config/examples/Anet/A6/Configuration.h

Marlin/src/config/examples/Anet/A8/Configuration.h

...n/src/config/examples/BIBO/TouchX/cyclops/Configuration.h

...n/src/config/examples/BIBO/TouchX/default/Configuration.h

...in/src/config/examples/FolgerTech/i3-2020/Configuration.h

Marlin/src/config/examples/Infitary/i3-M508/Configuration.h

Marlin/src/config/examples/JGAurora/A5/Configuration.h

Marlin/src/config/examples/RigidBot/Configuration.h

Marlin/src/config/examples/STM32F10/Configuration.h

Marlin/src/config/examples/Sanguinololu/Configuration.h

Marlin/src/config/examples/Tronxy/X1/Configuration.h

Marlin/src/config/examples/Tronxy/X5S/Configuration.h

Marlin/src/config/examples/Velleman/K8200/Configuration.h

Marlin/src/config/examples/Velleman/K8400/Configuration.h

.../config/examples/Velleman/K8400/Dual-head/Configuration.h

Marlin/src/config/examples/delta/kossel_mini/Configuration.h

Marlin/src/config/examples/gCreate/gMax1.5+/Configuration.h