drm/msm/dpu: remove QoS teardown on plane destruction

There is little point in disabling QoS on plane destruction: it happens
during DPU device destruction process, after which there will be no
running planes.
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/570049/
Link: https://lore.kernel.org/r/20231201211845.1026967-9-dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c

@@ -1217,17 +1217,10 @@ static void dpu_plane_atomic_update(struct drm_plane *plane,
 static void dpu_plane_destroy(struct drm_plane *plane)
 {
 	struct dpu_plane *pdpu = plane ? to_dpu_plane(plane) : NULL;
-	struct dpu_plane_state *pstate;
 
 	DPU_DEBUG_PLANE(pdpu, "\n");
 
 	if (pdpu) {
-		pstate = to_dpu_plane_state(plane->state);
-		_dpu_plane_set_qos_ctrl(plane, &pstate->pipe, false);
-
-		if (pstate->r_pipe.sspp)
-			_dpu_plane_set_qos_ctrl(plane, &pstate->r_pipe, false);
-
 		/* this will destroy the states as well */
 		drm_plane_cleanup(plane);