drm/i915: Remove unused variable from execlists_context_queue

After commit d7b9ca2f
("drm/i915: Remove request->uniq")

dev_priv is no longer needed.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NMichel Thierry <michel.thierry@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_lrc.c

@@ -523,7 +523,6 @@ static int execlists_context_queue(struct intel_engine_cs *ring,
 				   struct drm_i915_gem_request *request)
 {
 	struct drm_i915_gem_request *cursor;
-	struct drm_i915_private *dev_priv = ring->dev->dev_private;
 	int num_elements = 0;
 
 	if (to != ring->default_context)