remove unused variables
remove unused variables

metagenomics/MeRaGENE,metagenomics/bioPipeline,metagenomics/bioPipeline,metagenomics/bioPipeline,metagenomics/MeRaGENE,metagenomics/MeRaGENE,metagenomics/bioPipeline,metagenomics/MeRaGENE