drm/i915: drop gt/intel_gt.h include from skl_universal_plane.c

No longer needed after commit 94bcf876 ("drm/i915/mtl: Drop
Wa_14017240301").
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231011142704.985867-1-jani.nikula@intel.com

drivers/gpu/drm/i915/display/skl_universal_plane.c

@@ -21,7 +21,6 @@
 #include "skl_scaler.h"
 #include "skl_universal_plane.h"
 #include "skl_watermark.h"
-#include "gt/intel_gt.h"
 #include "pxp/intel_pxp.h"
 
 static const u32 skl_plane_formats[] = {