Remove file key from bib entries

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.79%. Comparing base (162e1fc) to head (bca9e4d). Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #301 +/- ## ======================================= Coverage 98.79% 98.79% ======================================= Files 78 78 Lines 1904 1904 ======================================= Hits 1881 1881 Misses 23 23 ```

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