VAAPI-X11: Surfaces are created and destroyed by a pool shared between decoder and video output.

The PictureRelease function destroyed the Surface as it needed to do when there was no
shared pool of surfaces. However now a shared pool of surfaces is used and the PictureRelease
function should not destroy it anymore.

modules/codec/avcodec/vaapi_x11.c

@@ -1290,11 +1290,6 @@ static void PictureRelease(picture_t *picture)
         }
 
         surface->i_cache = VA_INVALID_ID;
-
-        /* */
-        vd->sys->conn->lock();
-        vaDestroySurfaces(vd->sys->conn->p_display, &picture->p_sys->i_id, 1);
-        vd->sys->conn->unlock();
     }
 
     free(picture->p_sys);