Remove legacy 4G RLC

CMakeLists.txt

common/utils/var_array.h

openair1/SIMULATION/LTE_PHY/dlsim.c

openair1/SIMULATION/LTE_PHY/ulsim.c

openair1/SIMULATION/NR_PHY/dlsim.c

openair1/SIMULATION/NR_PHY/prachsim.c

openair1/SIMULATION/NR_PHY/ulsim.c

openair2/LAYER2/NR_MAC_gNB/mac_rrc_dl_handler.c

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am.c

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am.h

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_constants.h

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_entity.h

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_in_sdu.c

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_in_sdu.h

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_init.c

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_init.h

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_reassembly.c

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_reassembly.h

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_receiver.c

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am_receiver.h