DESIG_FLASH_SIZE is provided for all stm32 parts in desig.h, correctly defined as 16bits. Remove the incorrect duplicate definition within the f1 flash handling code. Fixes github issues #621
DESIG_FLASH_SIZE is provided for all stm32 parts in desig.h, correctly defined as 16bits. Remove the incorrect duplicate definition within the f1 flash handling code. Fixes github issues #621