[Core] Cleanup rules.mk for F303 keyboards (#7306)

* Cleanup rules.mk for F303 keyboards

* Fix small typo

keyboards/clueboard/60/rules.mk

@@ -1,41 +1,5 @@
-# project specific files
-SRC =	led.c
-LAYOUTS += 60_ansi 60_ansi_split_bs_rshift 60_iso
-
-## chip/board settings
-# - the next two should match the directories in
-#   <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
-MCU_FAMILY = STM32
-MCU_SERIES = STM32F3xx
-
-# Linker script to use
-# - it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
-#   or <this_dir>/ld/
-MCU_LDSCRIPT = STM32F303xC
-
-# Startup code to use
-#  - it should exist in <chibios>/os/common/startup/ARMCMx/compilers/GCC/mk/
-MCU_STARTUP = stm32f3xx
-
-# Board: it should exist either in <chibios>/os/hal/boards/
-#  or <this_dir>/boards
-BOARD = GENERIC_STM32_F303XC
-
-# Cortex version
-MCU  = cortex-m4
-
-# ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
-ARMV = 7
-
-USE_FPU = yes
-
-# Vector table for application
-# 0x00000000-0x00001000 area is occupied by bootlaoder.*/
-OPT_DEFS =
-
-# Options to pass to dfu-util when flashing
-DFU_ARGS = -d 0483:df11 -a 0 -s 0x08000000:leave
-DFU_SUFFIX_ARGS = -p DF11 -v 0483
+# MCU name
+MCU = STM32F303
 
 # Build Options
 #   comment out to disable the options.
@@ -48,3 +12,7 @@ CONSOLE_ENABLE = yes	  # Console for debug
 COMMAND_ENABLE = no     # Commands for debug and configuration
 NKRO_ENABLE = yes	      # USB Nkey Rollover
 AUDIO_ENABLE = yes
+
+# project specific files
+SRC =	led.c
+LAYOUTS += 60_ansi 60_ansi_split_bs_rshift 60_iso