refactor: Cleanup unused `asyncio` related code

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

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

Project coverage is 67.92%. Comparing base (42f7048) to head (bd7e9d8). Report is 3 commits behind head on master.

Additional details and impacted files

[](https://app.codecov.io/gh/powerapi-ng/powerapi/pull/446?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=powerapi-ng) ```diff @@ Coverage Diff @@ ## master #446 +/- ## ========================================== - Coverage 67.93% 67.92% -0.02% ========================================== Files 71 71 Lines 2978 2977 -1 ========================================== - Hits 2023 2022 -1 Misses 955 955 ``` | [Files with missing lines](https://app.codecov.io/gh/powerapi-ng/powerapi/pull/446?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=powerapi-ng) | Coverage Δ | | |---|---|---| | [src/powerapi/database/base\_db.py](https://app.codecov.io/gh/powerapi-ng/powerapi/pull/446?src=pr&el=tree&filepath=src%2Fpowerapi%2Fdatabase%2Fbase_db.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=powerapi-ng#diff-c3JjL3Bvd2VyYXBpL2RhdGFiYXNlL2Jhc2VfZGIucHk=) | `60.71% <100.00%> (-1.36%)` | :arrow_down: |