drm/fbdev-helper: Remove drm_fb_helper_output_poll_changed()

The function is unused. Remove it.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20240812083000.337744-8-tzimmermann@suse.de

drivers/gpu/drm/drm_fb_helper.c

@@ -2003,18 +2003,3 @@ void drm_fb_helper_lastclose(struct drm_device *dev)
 	drm_fb_helper_restore_fbdev_mode_unlocked(dev->fb_helper);
 }
 EXPORT_SYMBOL(drm_fb_helper_lastclose);
-
-/**
- * drm_fb_helper_output_poll_changed - DRM mode config \.output_poll_changed
- *                                     helper for fbdev emulation
- * @dev: DRM device
- *
- * This function can be used as the
- * &drm_mode_config_funcs.output_poll_changed callback for drivers that only
- * need to call drm_fbdev.hotplug_event().
- */
-void drm_fb_helper_output_poll_changed(struct drm_device *dev)
-{
-	drm_fb_helper_hotplug_event(dev->fb_helper);
-}
-EXPORT_SYMBOL(drm_fb_helper_output_poll_changed);

include/drm/drm_fb_helper.h

@@ -271,9 +271,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
 int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper);
 int drm_fb_helper_debug_enter(struct fb_info *info);
 int drm_fb_helper_debug_leave(struct fb_info *info);
-
 void drm_fb_helper_lastclose(struct drm_device *dev);
-void drm_fb_helper_output_poll_changed(struct drm_device *dev);
 #else
 static inline void drm_fb_helper_prepare(struct drm_device *dev,
 					 struct drm_fb_helper *helper,
@@ -401,10 +399,6 @@ static inline int drm_fb_helper_debug_leave(struct fb_info *info)
 static inline void drm_fb_helper_lastclose(struct drm_device *dev)
 {
 }
-
-static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev)
-{
-}
 #endif
 
 #endif