Drop unused LARGE_FLASH option

Marlin/src/pins/pins_5DPRINT.h

Marlin/src/pins/pins_ANET_10.h

Marlin/src/pins/pins_AZSMZ_MINI.h

Marlin/src/pins/pins_AZTEEG_X5_GT.h

Marlin/src/pins/pins_BRAINWAVE_PRO.h

Marlin/src/pins/pins_CHEAPTRONIC.h

Marlin/src/pins/pins_CHEAPTRONICv2.h

Marlin/src/pins/pins_CNCONTROLS_11.h

Marlin/src/pins/pins_CNCONTROLS_12.h

Marlin/src/pins/pins_GT2560_REV_A.h

Marlin/src/pins/pins_MEGATRONICS.h

Marlin/src/pins/pins_MEGATRONICS_2.h

Marlin/src/pins/pins_MEGATRONICS_3.h

Marlin/src/pins/pins_MIGHTYBOARD_REVE.h

Marlin/src/pins/pins_MINIRAMBO.h

Marlin/src/pins/pins_MINITRONICS.h

Marlin/src/pins/pins_MKS_SBASE.h

Marlin/src/pins/pins_PRINTRBOARD.h

Marlin/src/pins/pins_PRINTRBOARD_REVF.h

Marlin/src/pins/pins_RAMBO.h