Remove stub backlight functions from clueboard/66/rev4 (#8303)

keyboards/clueboard/66/rev4/rev4.c

@@ -8,39 +8,6 @@ void matrix_init_kb(void) {
     led_init_ports();
 }
 
-void matrix_scan_kb(void) {
-    matrix_scan_user();
-}
-
-void backlight_init_ports(void) {
-    print("init_backlight_pin()\n");
-    // Set our LED pins as output
-    //DDRD |= (1<<6); // Esc
-    //DDRB |= (1<<7); // Page Up
-    //DDRD |= (1<<4); // Arrows
-
-    // Set our LED pins low
-    //PORTD &= ~(1<<6); // Esc
-    //PORTB &= ~(1<<7); // Page Up
-    //PORTD &= ~(1<<4); // Arrows
-}
-
-void backlight_set(uint8_t level) {
-/*
-    if ( level == 0 ) {
-        // Turn off light
-        PORTD |= (1<<6); // Esc
-        PORTB |= (1<<7); // Page Up
-        PORTD |= (1<<4); // Arrows
-    } else {
-        // Turn on light
-        PORTD &= ~(1<<6); // Esc
-        PORTB &= ~(1<<7); // Page Up
-        PORTD &= ~(1<<4); // Arrows
-    }
-*/
-}
-
 void led_init_ports() {
     // Set our LED pins as output
     palSetPadMode(GPIOB, 13, PAL_MODE_OUTPUT_PUSHPULL); // LED1

keyboards/clueboard/66/rev4/rules.mk

@@ -4,15 +4,15 @@ MCU = STM32F303
 # Build Options
 #   comment out to disable the options.
 #
-BACKLIGHT_ENABLE = 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 = no     # Commands for debug and configuration
 NKRO_ENABLE = yes       # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 AUDIO_ENABLE = no
-RGBLIGHT_ENABLE = no    # Enable keyboard underlight functionality
+BACKLIGHT_ENABLE = no   # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no    # Enable keyboard RGB underglow
 MIDI_ENABLE = no        # MIDI controls
 UNICODE_ENABLE = no     # Unicode
 BLUETOOTH_ENABLE = no   # Enable Bluetooth with the Adafruit EZ-Key HID