XT converter cleanup (#12264)

keyboards/converter/xt_usb/rules.mk

@@ -2,28 +2,25 @@
 MCU = atmega32u4
 
 # Bootloader selection
-#   Teensy       halfkay
-#   Pro Micro    caterina
-#   Atmel DFU    atmel-dfu
-#   LUFA DFU     lufa-dfu
-#   QMK DFU      qmk-dfu
-#   ATmega32A    bootloadHID
-#   ATmega328P   USBasp
 BOOTLOADER = halfkay
 
 # Build Options
-#   comment out to disable the options.
+#   change yes to no to disable
 #
-BOOTMAGIC_ENABLE = no   # Virtual DIP switch configuration
-MOUSEKEY_ENABLE  = yes  # Mouse keys
-EXTRAKEY_ENABLE  = yes  # Audio control and System control
-CONSOLE_ENABLE   = yes  # Console for debug
-COMMAND_ENABLE   = yes  # Commands for debug and configuration
-NKRO_ENABLE      = yes  # USB Nkey Rollover
-XT_ENABLE        = yes
-CUSTOM_MATRIX    = yes
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = yes        # Console for debug
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+XT_ENABLE = yes
+CUSTOM_MATRIX = yes
 
 SRC += matrix.c
-
-# Optimize size but this may cause error "relocation truncated to fit"
-#EXTRALDFLAGS = -Wl,--relax