cleanup of unused gnb phy fields

common/openairinterface5g_limits.h

nfapi/oai_integration/nfapi_pnf.c

openair1/PHY/INIT/nr_init.c

openair1/PHY/NR_TRANSPORT/nr_dlsch.c

openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c

openair1/PHY/NR_TRANSPORT/nr_transport_proto.h

openair1/PHY/NR_TRANSPORT/nr_ulsch_decoding.c

openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c

openair1/PHY/NR_TRANSPORT/pucch_rx.c

openair1/PHY/defs_gNB.h

openair1/SIMULATION/NR_PHY/dlsim.c

openair1/SIMULATION/NR_PHY/pbchsim.c