remove generating release note step

[codecov[bot]]

Codecov Report

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

Project coverage is 32.79%. Comparing base (b12e3c6) to head (e1aadc7).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #680 +/- ## ======================================= Coverage 32.79% 32.79% ======================================= Files 54 54 Lines 4312 4312 ======================================= Hits 1414 1414 Misses 2866 2866 Partials 32 32 ``` | [Flag](https://app.codecov.io/gh/traPtitech/traPortfolio/pull/680/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=traPtitech) | Coverage Δ | | |---|---|---| | [integration](https://app.codecov.io/gh/traPtitech/traPortfolio/pull/680/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=traPtitech) | `32.79% <ø> (ø)` | | | [unit](https://app.codecov.io/gh/traPtitech/traPortfolio/pull/680/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=traPtitech) | `32.79% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=traPtitech#carryforward-flags-in-the-pull-request-comment) to find out more.

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