Remove parametric and visualization code

[mkundu1]

No description provided.

[mkundu1]

Yet to upload the .whl files of parametric and visualization repos in artifactory and azure pypi. There seems to be an issue in uploading those packages to pypi as they have url dependency for pyfluent core github repo.

Uploading distributions to 
https://pkgs.dev.azure.com/pyansys/_packaging/pyansys/pypi/upload
Uploading ansys_fluent_parametric-0.1.dev0-py3-none-any.whl
25l
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25hWARNING  Error during upload. Retry with the --verbose option for more details. 
ERROR    HTTPError: 400 Bad Request from                                        
         https://pkgs.dev.azure.com/pyansys/_packaging/pyansys/py
         Bad Request - Packages with direct (URL) references in Requires-Dist   
         are not allowed. (DevOps Activity ID:                                  
         6223F456-CF3E-4CE3-[83](https://github.com/pyansys/pyfluent-parametric/runs/6726896845?check_suite_focus=true#step:5:84)76-527914BC0A[87](https://github.com/pyansys/pyfluent-parametric/runs/6726896845?check_suite_focus=true#step:5:88))                                  
Error: Process completed with exit code 1.

Only remaining issue is that we cannot to upload the parametric and visualization .whl files in the private pypi due to a pypi restriction of url dependency. This won't affect release as the url dependency for the core repo will be replaced with pypi index.