refactor: removing warnings

[germa89]

Description

Pytest hides some warnings, this PR removes some of them.

To see the warnings you need to pytest -W error.

Issue linked

NA

Checklist

• I have visited and read Develop PyMAPDL.
• I have tested my changes locally
• I have added necessary documentation or updated existing documentation.
• I have followed the PyMAPDL coding style guidelines.
• I have added appropriate unit tests that also ensure the minimal coverage criteria.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have marked this PR as draft if it is not ready to be reviewed yet.
• I have made sure that the title of my PR follows Commit naming conventions (e.g. feat: adding new MAPDL command)

[ansys-reviewer-bot]

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[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.37%. Comparing base (4c6e65a) to head (113c896).
Report is 8 commits behind head on main.

❌ Your patch status has failed because the patch coverage (80.00%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3763      +/-   ##
==========================================
+ Coverage   88.35%   88.37%   +0.02%     
==========================================
  Files         187      187              
  Lines       14704    14721      +17     
==========================================
+ Hits        12991    13010      +19     
+ Misses       1713     1711       -2     

[germa89]

@pyansys-ci-bot LGTM.

[pyansys-ci-bot]

✅ Approving this PR because germa89 said so in here 😬