Use only unique entries in notes
Use only unique entries in notes

This reduces the duplication which can arise in parsing notes. This way
this will always produce the same notes in the same order without
duplicates.

RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline