drm/amdgpu: remove set but not used variable 'priority'

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

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:1211:26: warning: variable ‘priority’ set but not used

It is not used since commit 33abcb1f ("drm/amdgpu:
set compute queue priority at mqd_init")
Reviewed-by: Christian König <christian.koenig@amd.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zheng Bin <zhengbin13@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -1208,7 +1208,6 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 {
 	struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 	struct drm_sched_entity *entity = p->entity;
-	enum drm_sched_priority priority;
 	struct amdgpu_bo_list_entry *e;
 	struct amdgpu_job *job;
 	uint64_t seq;
@@ -1258,7 +1257,6 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 
 	trace_amdgpu_cs_ioctl(job);
 	amdgpu_vm_bo_trace_cs(&fpriv->vm, &p->ticket);
-	priority = job->base.s_priority;
 	drm_sched_entity_push_job(&job->base, entity);
 
 	amdgpu_vm_move_to_lru_tail(p->adev, &fpriv->vm);