drm/sysfb: Remove duplicate declarations

Commit 6046b49 ("drm/sysfb: Share helpers for integer validation")
and commit e8c0868 ("drm/sysfb: Share helpers for screen_info
validation") added duplicate function declarations. Remove the latter
ones.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: e8c0868 ("drm/sysfb: Share helpers for screen_info validation")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v6.16+
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patch.msgid.link/20260108145058.56943-7-tzimmermann@suse.de

Author: tdz

drivers/gpu/drm/sysfb/drm_sysfb_helper.h

@@ -54,15 +54,6 @@ const struct drm_format_info *drm_sysfb_get_format_si(struct drm_device *dev,
 						      const struct screen_info *si);
 #endif
 
-/*
- * Input parsing
- */
-
-int drm_sysfb_get_validated_int(struct drm_device *dev, const char *name,
-				u64 value, u32 max);
-int drm_sysfb_get_validated_int0(struct drm_device *dev, const char *name,
-				 u64 value, u32 max);
-
 /*
  * Display modes
  */