qcacmn: Cleanup unused typedef variables

Remove unused typedef rx_callback_fp in
datapath flow.

Change-Id: Ie40f8ab02a1437d2c86aadb2f35f5f548f00f1bc
CRs-Fixed: 2123478

dp/inc/cdp_txrx_mob_def.h

@@ -384,10 +384,6 @@ struct ieee80211_delba_parameterset {
 #endif
 } __packed;
 
-typedef QDF_STATUS(*rx_callback_fp)(void *p_cds_gctx,
-		qdf_nbuf_t pDataBuff,
-		uint8_t ucSTAId);
-
 /**
  * ol_txrx_vdev_peer_remove_cb - wma_remove_peer callback
  */