drm/i915: remove excessive i915_gem_drain_freed_objects

i915_gem_drain_workqueue() call i915_gem_drain_freed_objects()
so no need to call that again.
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: NNirmoy Das <nirmoy.das@intel.com>
Reviewed-by: NAndrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: NAndi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220923073515.23093-2-nirmoy.das@intel.com

drivers/gpu/drm/i915/i915_gem.c

@@ -1200,8 +1200,6 @@ void i915_gem_driver_remove(struct drm_i915_private *dev_priv)
 
 	/* Flush any outstanding unpin_work. */
 	i915_gem_drain_workqueue(dev_priv);
-
-	i915_gem_drain_freed_objects(dev_priv);
 }
 
 void i915_gem_driver_release(struct drm_i915_private *dev_priv)

drivers/gpu/drm/i915/selftests/mock_gem_device.c

@@ -67,7 +67,6 @@ static void mock_device_release(struct drm_device *dev)
 	intel_gt_driver_remove(to_gt(i915));
 
 	i915_gem_drain_workqueue(i915);
-	i915_gem_drain_freed_objects(i915);
 
 	mock_fini_ggtt(to_gt(i915)->ggtt);
 	destroy_workqueue(i915->wq);