Delete ITTI-SIM

cmake_targets/CMakeLists.txt

cmake_targets/build_oai

common/utils/ocp_itti/all_msg.h

common/utils/ocp_itti/intertask_interface.h

doc/ITTISIM.md

openair2/COMMON/itti_sim_messages_def.h

openair2/COMMON/itti_sim_messages_types.h

openair2/F1AP/f1ap_cu_ue_context_management.c

openair2/RRC/LTE/defs_NB_IoT.h

openair2/RRC/NR/mac_rrc_dl_direct.c

openair2/RRC/NR/rrc_gNB.c

openair2/RRC/NR/rrc_gNB_NGAP.c

openair2/RRC/NR_UE/rrc_UE.c

openair2/SIMULATION/NR_RRC/itti_sim.c

openair3/NGAP/ngap_gNB_nas_procedures.c