Removed appveyor

[javadev]

No description provided.

[sonarqubecloud]

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 SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (099e616) to head (7c8ede5).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##                main      #787   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity      1596      1596           
===========================================
  Files              6         6           
  Lines           4555      4555           
  Branches         834       834           
===========================================
  Hits            4555      4555           

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[javadev]

What problem does this code solve?
Removed appveyor integration.

Does the code still compile with Java 11?
Yes

Risks
Low

Changes to the API?
No

Will this require a new release?
No

Should the documentation be updated?
No

Does it break the unit tests?
No

Was any code refactored in this commit?
No

Review status
APPROVED

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