[ENSCORESW-2168]. Test negative search + remove unused subroutine.
[ENSCORESW-2168]. Test negative search + remove unused subroutine.

Ensembl/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,Ensembl/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,muffato/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,muffato/ensembl,muffato/ensembl,muffato/ensembl