qcacld-3.0: Remove struct del_vdev_params::sme_ctx

The last reference to the sme_ctx member of struct del_vdev_params was
removed with the following patch:
    qcacld-3.0: Send vdev delete to firmware on notification
    Change-Id I67bea0d2b2a0d2d9eb4602e5d0b8bbdcafdd4d26

Since it is now obsolete, remove it.

Change-Id: I9f016232d62c469075d4abb8e718d6876179e4bf
CRs-Fixed: 3429768

core/wma/inc/wma_if.h

@@ -733,14 +733,12 @@ struct set_dtim_params {
  * @session_id: SME Session ID
  * @status: response status code
  * @vdev: Object to vdev
- * @sme_ctx: pointer to context provided by SME
  */
 struct del_vdev_params {
 	tSirMacAddr self_mac_addr;
 	uint8_t vdev_id;
 	uint32_t status;
 	struct wlan_objmgr_vdev *vdev;
-	void *sme_ctx;
 };
 
 /**