chore: remove unused PWM_BACKLIGHT define (#4945)

Most of the code was removed between OTX 2.2 and 2.3

radio/src/gui/128x64/radio_setup.cpp

@@ -86,8 +86,6 @@ enum {
   CASE_BACKLIGHT(ITEM_RADIO_SETUP_BACKLIGHT_MODE)
   CASE_BACKLIGHT(ITEM_RADIO_SETUP_BACKLIGHT_DELAY)
   CASE_BACKLIGHT(ITEM_RADIO_SETUP_BRIGHTNESS)
-  CASE_PWM_BACKLIGHT(ITEM_RADIO_SETUP_BACKLIGHT_BRIGHTNESS_OFF)
-  CASE_PWM_BACKLIGHT(ITEM_RADIO_SETUP_BACKLIGHT_BRIGHTNESS_ON)
   CASE_BACKLIGHT(ITEM_RADIO_SETUP_FLASH_BEEP)
   CASE_CONTRAST(ITEM_RADIO_SETUP_CONTRAST)
   CASE_SPLASH_PARAM(ITEM_RADIO_SETUP_DISABLE_SPLASH)
@@ -186,8 +184,6 @@ void menuRadioSetup(event_t event)
     CASE_BACKLIGHT(0)
     CASE_BACKLIGHT(0)
     CASE_BACKLIGHT(0)
-    CASE_PWM_BACKLIGHT(0)
-    CASE_PWM_BACKLIGHT(0)
     CASE_BACKLIGHT(0)
     CASE_CONTRAST(0)
     CASE_SPLASH_PARAM(0)
@@ -567,20 +563,6 @@ void menuRadioSetup(event_t event)
         break;
 #endif
 
-#if defined(PWM_BACKLIGHT)
-      case ITEM_RADIO_SETUP_BACKLIGHT_BRIGHTNESS_OFF:
-        lcdDrawText(INDENT_WIDTH, y, STR_BLOFFBRIGHTNESS);
-        lcdDrawNumber(LCD_W-2, y, g_eeGeneral.blOffBright, attr|RIGHT);
-        if (attr) CHECK_INCDEC_GENVAR(event, g_eeGeneral.blOffBright, 0, 15);
-        break;
-
-      case ITEM_RADIO_SETUP_BACKLIGHT_BRIGHTNESS_ON:
-        lcdDrawText(INDENT_WIDTH, y, STR_BLONBRIGHTNESS);
-        lcdDrawNumber(LCD_W-2, y, 15-g_eeGeneral.blOnBright, attr|RIGHT);
-        if (attr) g_eeGeneral.blOnBright = 15 - checkIncDecGen(event, 15-g_eeGeneral.blOnBright, 0, 15);
-        break;
-#endif
-
       case ITEM_RADIO_SETUP_DISABLE_SPLASH:
       {
         lcdDrawTextAlignedLeft(y, STR_SPLASHSCREEN);

radio/src/gui/common/stdlcd/features.h

@@ -65,12 +65,6 @@
   #define CASE_AUDIO(x)
 #endif
 
-#if defined(PWM_BACKLIGHT)
-  #define CASE_PWM_BACKLIGHT(x) x,
-#else
-  #define CASE_PWM_BACKLIGHT(x)
-#endif
-
 #if defined(GPS)
   #define CASE_GPS(x) x,
 #else

radio/src/opentx.cpp

@@ -208,11 +208,6 @@ void per10ms()
   telemetryInterrupt10ms();
 
   // These moved here from evalFlightModeMixes() to improve beep trigger reliability.
-#if defined(PWM_BACKLIGHT)
-  if ((g_tmr10ms&0x03) == 0x00)
-    backlightFade(); // increment or decrement brightness until target brightness is reached
-#endif
-
 #if !defined(AUDIO)
   if (mixWarning & 1) if(((g_tmr10ms&0xFF)==  0)) AUDIO_MIX_WARNING(1);
   if (mixWarning & 2) if(((g_tmr10ms&0xFF)== 64) || ((g_tmr10ms&0xFF)== 72)) AUDIO_MIX_WARNING(2);

radio/src/translations.cpp

@@ -834,7 +834,7 @@ const char STR_IMU_OFFSET[] = TR_IMU_OFFSET;
 const char STR_IMU_MAX[] = TR_IMU_MAX;
 #endif
 
-#if defined(PWM_BACKLIGHT) || defined(COLORLCD)
+#if defined(COLORLCD)
 const char STR_BLONBRIGHTNESS[] = TR_BLONBRIGHTNESS;
 const char STR_BLOFFBRIGHTNESS[] = TR_BLOFFBRIGHTNESS;
 const char STR_KEYS_BACKLIGHT[]  = TR_KEYS_BACKLIGHT;

radio/src/translations.h

@@ -418,7 +418,7 @@ extern const char STR_GHOST_MENU_LABEL[];
 extern const char STR_STATUS[];
 extern const char STR_BLDELAY[];
 
-#if defined(PWM_BACKLIGHT) || defined(COLORLCD)
+#if defined(COLORLCD)
 extern const char STR_BLONBRIGHTNESS[];
 extern const char STR_BLOFFBRIGHTNESS[];
 extern const char STR_KEYS_BACKLIGHT[];