drm/fb-helper: Remove set but not used variable 'connector_funcs'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/drm_fb_helper.c: In function 'drm_pick_crtcs':
drivers/gpu/drm/drm_fb_helper.c:2373:43: warning:
 variable 'connector_funcs' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1536722130-108819-1-git-send-email-yuehaibing@huawei.com

drivers/gpu/drm/drm_fb_helper.c

@@ -2370,7 +2370,6 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
 {
 	int c, o;
 	struct drm_connector *connector;
-	const struct drm_connector_helper_funcs *connector_funcs;
 	int my_score, best_score, score;
 	struct drm_fb_helper_crtc **crtcs, *crtc;
 	struct drm_fb_helper_connector *fb_helper_conn;
@@ -2399,8 +2398,6 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
 	if (drm_has_preferred_mode(fb_helper_conn, width, height))
 		my_score++;
 
-	connector_funcs = connector->helper_private;
-
 	/*
 	 * select a crtc for this connector and then attempt to configure
 	 * remaining connectors