drm/i915: Remove unused DP_LINK_CHECK_TIMEOUT

Signed-off-by: NLyude Paul <lyude@redhat.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NManasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180308232421.14049-2-lyude@redhat.com

drivers/gpu/drm/i915/intel_dp.c

@@ -43,7 +43,6 @@
 #include <drm/i915_drm.h>
 #include "i915_drv.h"
 
-#define DP_LINK_CHECK_TIMEOUT	(10 * 1000)
 #define DP_DPRX_ESI_LEN 14
 
 /* Compliance test status bits  */