drm/panfrost: Remove unused variables in panfrost_job_close()

Commit a17d609e ("drm/panfrost: Don't corrupt the queue mutex on
open/close") left unused variables behind, thus generating a warning
at compilation time. Remove those variables.

Fixes: a17d609e ("drm/panfrost: Don't corrupt the queue mutex on open/close")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201101173817.831769-1-boris.brezillon@collabora.com

drivers/gpu/drm/panfrost/panfrost_job.c

@@ -613,8 +613,6 @@ int panfrost_job_open(struct panfrost_file_priv *panfrost_priv)
 
 void panfrost_job_close(struct panfrost_file_priv *panfrost_priv)
 {
-	struct panfrost_device *pfdev = panfrost_priv->pfdev;
-	struct panfrost_job_slot *js = pfdev->js;
 	int i;
 
 	for (i = 0; i < NUM_JOB_SLOTS; i++)