Misskey Gamesを廃止する

[adzukimame]

What

• Purge Games
• Completes リバーシを廃止する #112 and バブルゲームを廃止する #114

Why

Additional info (optional)

Checklist

• コントリビューションガイド を確認した
• ローカル環境でテストが動作している
• （必要なら）Storybookのストーリーを追加する
• （必要なら）CHANGELOGを更新する
• （可能なら）テストを追加する

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 20.82%. Comparing base (b0fa49d) to head (90c9936).
Report is 1 commits behind head on develop-mame.

Additional details and impacted files

@@                Coverage Diff                @@
##           develop-mame     #115       +/-   ##
=================================================
- Coverage         42.09%   20.82%   -21.27%     
=================================================
  Files              1532      720      -812     
  Lines            192500    97456    -95044     
  Branches           3577     1047     -2530     
=================================================
- Hits              81032    20299    -60733     
+ Misses           110879    76619    -34260     
+ Partials            589      538       -51     

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