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_du_rrc_message_transfer.c

@@ -74,11 +74,6 @@ int DU_handle_DL_RRC_MESSAGE_TRANSFER(instance_t       instance,
                              F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
   uint32_t du_ue_f1ap_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
 
-  if (f1ap_du_add_cu_ue_id(instance,du_ue_f1ap_id, cu_ue_f1ap_id) < 0 ) {
-    LOG_E(F1AP, "Failed to find the F1AP UID \n");
-    //return -1;
-  }
-
   /* optional */
   /* oldgNB_DU_UE_F1AP_ID */
   if (0) {
@@ -146,12 +141,6 @@ int DU_send_INITIAL_UL_RRC_MESSAGE_TRANSFER(instance_t instanceP, const f1ap_ini
   F1AP_InitialULRRCMessageTransfer_t    *out;
   uint8_t  *buffer=NULL;
   uint32_t  len=0;
-  int f1ap_uid = f1ap_add_ue(DUtype, instanceP, msg->crnti);
-
-  if (f1ap_uid  < 0 ) {
-    LOG_E(F1AP, "Failed to add UE \n");
-    return -1;
-  }
 
   /* Create */
   /* 0. Message Type */