[PATCH -next] drm: Remove set but not used variable 'config'

[YueHaibing]

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

drivers/gpu/drm/drm_plane.c: In function 'drm_mode_getplane_res':
drivers/gpu/drm/drm_plane.c:475:26: warning:
 variable 'config' set but not used [-Wunused-but-set-variable]

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/gpu/drm/drm_plane.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 36bf3fe..4a72c68 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -472,7 +472,6 @@ int drm_mode_getplane_res(struct drm_device *dev, void 
*data,
                          struct drm_file *file_priv)
 {
        struct drm_mode_get_plane_res *plane_resp = data;
-       struct drm_mode_config *config;
        struct drm_plane *plane;
        uint32_t __user *plane_ptr;
        int count = 0;
@@ -480,7 +479,6 @@ int drm_mode_getplane_res(struct drm_device *dev, void 
*data,
        if (!drm_core_check_feature(dev, DRIVER_MODESET))
                return -EINVAL;
 
-       config = &dev->mode_config;
        plane_ptr = u64_to_user_ptr(plane_resp->plane_id_ptr);
 
        /*