Apply suggestions from code review

Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/cannonkeys/adelie/rules.mk

@@ -2,13 +2,6 @@
 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 = atmel-dfu
 
 # Build Options
@@ -25,8 +18,5 @@ SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 NKRO_ENABLE = no            # USB Nkey Rollover
 BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
-MIDI_ENABLE = no            # MIDI support
-BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
-AUDIO_ENABLE = no           # Audio output on port C6
-FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
-HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output