mc_767_remove_data_source_duplicates_check

[maxachis]

Fixes

• Create and use /source-collector/data-sources/duplicates endpoint #767

Description

• Removes data sources duplicates endpoint entirely -- we don't use it, so one less thing to maintain!

Testing

• Run tests and confirm functionality

Performance

• Reduced test overhead

Docs

• Endpoints updated

Breaking Changes

• Removes data-sources/duplicates endpoint, but this is not in use anywhere.