qcacld-3.0: Remove t_wma_handle::ocb_config_req

The follow change removed all usage of the t_wma_handle ocb_config_req
member:
  qcacld-3.0: Clean up OCB legacy code
  Change-Id Ib8a26c9e67e78e53f8b2b4929276060687254ea1

However the member itself was not removed, so remove it now.

Change-Id: Id61a2575b9e7d447bb88133322fae9aa7ef33cb5
CRs-Fixed: 3424783

core/wma/inc/wma.h

@@ -996,7 +996,6 @@ typedef struct {
 	uint32_t old_hw_mode_index;
 	uint32_t new_hw_mode_index;
 	wma_peer_authorized_fp peer_authorized_cb;
-	struct sir_ocb_config *ocb_config_req;
 	uint16_t self_gen_frm_pwr;
 	bool tx_chain_mask_cck;
 	qdf_mc_timer_t service_ready_ext_timer;