drm/amd/display: Leave all validate_ctx life cycle management to DC.

Follow DC fix.
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -653,27 +653,12 @@ dm_atomic_state_alloc(struct drm_device *dev)
 	return &state->base;
 }
 
-
-void dm_atomic_state_clear(struct drm_atomic_state *state)
-{
-	struct dm_atomic_state *dm_state = to_dm_atomic_state(state);
-
-	if (dm_state->context) {
-		dc_resource_validate_ctx_destruct(dm_state->context);
-		dm_free(dm_state->context);
-		dm_state->context = NULL;
-	}
-
-	drm_atomic_state_default_clear(state);
-}
-
 static const struct drm_mode_config_funcs amdgpu_dm_mode_funcs = {
 	.fb_create = amdgpu_user_framebuffer_create,
 	.output_poll_changed = amdgpu_output_poll_changed,
 	.atomic_check = amdgpu_dm_atomic_check,
 	.atomic_commit = amdgpu_dm_atomic_commit,
 	.atomic_state_alloc = dm_atomic_state_alloc,
-	.atomic_state_clear = dm_atomic_state_clear,
 };
 
 static struct drm_mode_config_helper_funcs amdgpu_dm_mode_config_helperfuncs = {