refactor(database): Remove unused virtiofs database

[gfieni]

No description provided.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

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

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.10%. Comparing base (92f6b31) to head (d061c8c).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #607      +/-   ##
==========================================
+ Coverage   68.62%   69.10%   +0.47%     
==========================================
  Files          77       75       -2     
  Lines        2923     2874      -49     
==========================================
- Hits         2006     1986      -20     
+ Misses        917      888      -29     

Files with missing lines	Coverage Δ
src/powerapi/cli/common_cli_parsing_manager.py	0.00% <ø> (ø)
src/powerapi/cli/generator.py	84.47% <100.00%> (ø)
src/powerapi/database/__init__.py	100.00% <ø> (ø)

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