Revert "qcacmn: Add cdp ops to set/get timestamp for management frames"

1) This reverts commit
   I7025fdd7540f47bb4d3f95ef6d9f2ef92af5f1f1

2) Reverted changes have been taken care through:
   Idd7617782e71ee187eef7fcb3523c05b49f82094

CRs-Fixed: 2300055
Change-Id: Icc47ded9a585e356b7eae1ad53ffea6668510308

dp/inc/cdp_txrx_ops.h

@@ -1111,8 +1111,6 @@ struct cdp_ocb_ops {
  * @remove_peers_for_vdev_no_lock:
  * @copy_mac_addr_raw:
  * @add_last_real_peer:
- * @get_last_mgmt_timestamp:
- * @set_last_mgmt_timestamp:
  * @is_vdev_restore_last_peer:
  * @update_last_real_peer:
  */
@@ -1160,14 +1158,6 @@ struct cdp_peer_ops {
 	void (*update_last_real_peer)(struct cdp_pdev *pdev, void *peer,
 			uint8_t *peer_id, bool restore_last_peer);
 	void (*peer_detach_force_delete)(void *peer);
-	bool (*get_last_mgmt_timestamp)(struct cdp_pdev *ppdev,
-					u8 *peer_addr,
-					u8 subtype,
-					qdf_time_t *timestamp);
-	bool (*update_last_mgmt_timestamp)(struct cdp_pdev *ppdev,
-					   u8 *peer_addr,
-					   qdf_time_t timestamp,
-					   u8 subtype);
 };
 
 /**