Remove unused fixtures

tests/conftest.py

...ElementChildren/6ebebd79-2a28-464f-b60a-aa47a864a586.json

...tTranscriptions/5bcb0a49-4810-4107-9b7f-62c30f913399.json

...tTranscriptions/6139d79e-be7b-46fd-9cde-20268bfb5114.json

...tTranscriptions/6b86c7b2-2274-4487-a2c1-8856e18d3a36.json

...tTranscriptions/9c184955-2e83-493f-bf97-f8db2a53218d.json

...tTranscriptions/b0c1f61d-ec2c-47c6-be4f-773bc4adf92a.json

...tTranscriptions/d336445e-a3ea-4278-a973-a14daefab229.json

...tTranscriptions/e060aa4c-2e1c-499b-8fe7-f0a12d504c8d.json

...tTranscriptions/ec353ce8-a1d7-400a-817e-f79d54f17016.json

...a/pinned_insects/d336445e-a3ea-4278-a973-a14daefab229.jpg

tests/data/pinned_insects/partitions/TestLines.lst

tests/data/pinned_insects/partitions/TrainLines.lst

tests/data/pinned_insects/partitions/ValidationLines.lst