Remove F1 module UE handling

The UE had a list of known UEs. With the introduction of a separate
module for F1 UE ID handling that is also used in monolithic (to
separate CU UE ID from DU UE ID), this functionality is not needed, and
deleted in this commit.

openair2/F1AP/f1ap_cu_rrc_message_transfer.c

@@ -88,13 +88,6 @@ int CU_handle_INITIAL_UL_RRC_MESSAGE_TRANSFER(instance_t             instance,
   F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_InitialULRRCMessageTransferIEs_t, du2cu, container,
                              F1AP_ProtocolIE_ID_id_DUtoCURRCContainer, false);
 
-  int f1ap_uid = f1ap_add_ue(CUtype, instance, rnti);
-
-  if (f1ap_uid  < 0 ) {
-    LOG_E(F1AP, "Failed to add UE \n");
-    return -1;
-  }
-
   // create an ITTI message and copy SDU
   AssertFatal(f1ap_req(true, instance)->cell_type == CELL_MACRO_GNB, "illegal cell type %d\n", f1ap_req(true, instance)->cell_type);
   message_p = itti_alloc_new_message(TASK_CU_F1, 0, F1AP_INITIAL_UL_RRC_MESSAGE);
@@ -246,14 +239,10 @@ int CU_handle_UL_RRC_MESSAGE_TRANSFER(instance_t       instance,
   F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_ULRRCMessageTransferIEs_t, ie, container,
                              F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID, true);
   cu_ue_f1ap_id = ie->value.choice.GNB_CU_UE_F1AP_ID;
-  LOG_D(F1AP, "cu_ue_f1ap_id %lu associated with RNTI %x\n",
-        cu_ue_f1ap_id, f1ap_get_rnti_by_cu_id(CUtype, instance, cu_ue_f1ap_id));
   /* GNB_DU_UE_F1AP_ID */
   F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_ULRRCMessageTransferIEs_t, ie, container,
                              F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
   du_ue_f1ap_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
-  LOG_D(F1AP, "du_ue_f1ap_id %lu associated with RNTI %x\n",
-        du_ue_f1ap_id, f1ap_get_rnti_by_cu_id(CUtype, instance, du_ue_f1ap_id));
   /* the RLC-PDCP does not transport the DU UE ID (yet), so we drop it here.
    * For the moment, let's hope this won't become relevant; to sleep in peace,
    * let's put an assert to check that it is the expected DU UE ID. */