phy: dphy: Remove unused header

The videomode.h header inclusion is an artifact from the patches
development, remove it.
Suggested-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

include/linux/phy/phy-mipi-dphy.h

@@ -6,8 +6,6 @@
 #ifndef __PHY_MIPI_DPHY_H_
 #define __PHY_MIPI_DPHY_H_
 
-#include <video/videomode.h>
-
 /**
  * struct phy_configure_opts_mipi_dphy - MIPI D-PHY configuration set
  *