[ABW]: removed duplicate tests that were moved to separate folder

..._patterns/get_discussions_by_author_before_date.orig.json

...i_patterns/get_discussions_by_author_before_date.pat.json

...et_discussions_by_author_before_date_no_results.orig.json

...get_discussions_by_author_before_date_no_results.pat.json

...et_discussions_by_author_before_date_over_limit.orig.json

...get_discussions_by_author_before_date_over_limit.pat.json

hivemind/tavern/test_condenser_api_patterns.tavern.yaml