Remove SetCustomMode from all controllers beginning with the letter K

Controllers/KeychronKeyboardController/RGBController_KeychronKeyboard.cpp

@@ -670,11 +670,6 @@ void RGBController_KeychronKeyboard::UpdateSingleLED(int led)
     UpdateZoneLEDs(led);
 }
 
-void RGBController_KeychronKeyboard::SetCustomMode()
-{
-    active_mode = 0;
-}
-
 void RGBController_KeychronKeyboard::DeviceUpdateMode()
 {
     UpdateZoneLEDs(0);

Controllers/KeychronKeyboardController/RGBController_KeychronKeyboard.h

@@ -20,11 +20,12 @@ public:
 
     void SetupZones();
     void ResizeZone(int zone, int new_size);
+
     void DeviceUpdateLEDs();
     void UpdateZoneLEDs(int zone);
     void UpdateSingleLED(int led);
+
     void DeviceUpdateMode();
-    void SetCustomMode();
 
 private:
     KeychronKeyboardController* controller;