drm: Remove unused variable in drm_pick_crtcs()

	struct drm_connector *connector;

	struct drm_connector_helper_funcs *connector_funcs;

	struct drm_encoder *encoder;

	struct drm_fb_helper_crtc *best_crtc;

	int my_score, best_score, score;

	struct drm_fb_helper_crtc **crtcs, *crtc;

	struct drm_fb_helper_connector *fb_helper_conn;

	connector = fb_helper_conn->connector;

	best_crtcs[n] = NULL;

	best_crtc = NULL;

	best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);

	if (modes[n] == NULL)

		return best_score;

		score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,

						  width, height);

		if (score > best_score) {

			best_crtc = crtc;

			best_score = score;

			memcpy(best_crtcs, crtcs,

			       dev->mode_config.num_connector *