Parameters cleaning nnvc

cfg/encoder_intra_nnvc.cfg

cfg/encoder_lowdelay_P_nnvc.cfg

cfg/encoder_lowdelay_nnvc.cfg

cfg/encoder_randomaccess_nnvc.cfg

cfg/encoder_randomaccess_nnvc_gop16.cfg

cfg/nn-based/HOP.cfg

cfg/nn-based/NnlfOption_1.cfg

cfg/nn-based/NnlfOption_2.cfg

cfg/nn-based/NnlfOption_3.cfg

source/App/DecoderApp/DecAppCfg.cpp

source/App/EncoderApp/EncAppCfg.cpp

training/training_scripts/NN_Filtering/HOP/hop_config.json

training/training_scripts/NN_Filtering/HOP/readme.md

training/training_scripts/NN_Filtering/LOP/lop_config.json

training/training_scripts/NN_Filtering/LOP/readme.md