Cleanup rules.mk for 32A and 328P keyboards (#6767)

keyboards/mechmini/v1/rules.mk

@@ -15,19 +15,15 @@
 
 # MCU name
 MCU = atmega32a
-PROTOCOL = VUSB
 
-# unsupported features for now
-NO_UART = yes
-NO_SUSPEND_POWER_DOWN = yes
-
-# processor frequency
-F_CPU = 12000000
-
-# Bootloader
-#     This definition is optional, and if your keyboard supports multiple bootloaders of
-#     different sizes, comment this out, and the correct address will be loaded
-#     automatically (+60). See bootloader.mk for all options.
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
 BOOTLOADER = atmel-dfu
 
 # build options
@@ -45,6 +41,3 @@ OPT_DEFS = -DDEBUG_LEVEL=0
 # custom matrix setup
 CUSTOM_MATRIX = yes
 SRC = matrix.c i2c.c
-
-# programming options
-PROGRAM_CMD = ./util/atmega32a_program.py $(TARGET).hex