include/video.h: Remove declaration of functions that don't exist.

video_init, video_putc and video_puts functions are not implemented
anywhere, remove their declaration from the header.
Signed-off-by: NLiviu Dudau <liviu.dudau@foss.arm.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NHeiko Schocher <hs@denx.de>

include/video.h

@@ -198,12 +198,6 @@ void video_set_default_colors(struct video_priv *priv);
 
 /* Video functions */
 
-struct stdio_dev;
-
-int	video_init(void *videobase);
-void	video_putc(struct stdio_dev *dev, const char c);
-void	video_puts(struct stdio_dev *dev, const char *s);
-
 /**
  * Display a BMP format bitmap on the screen
  *