remove test shebangs

[devyntk]

these cause an issue when packaging on centos9, as they do not specify python2 or python3, and thus panic during building.

[mpenning]

Hello @devyntk

I think the question should be asked why this is a problem to begin with. These shebangs have existed in the code base for years and it's never been a problem. By way of example, all these tests pass github CICD and yet they don't pass centos9 package build process?

However, let's just assume for the moment that there is something new in centos9 that somehow trips over them in the package build process. You have choices:

1. Do not try to run the tests
2. Manually chmod the files to remove the execute bit
3. Manually remove the entire tests/ folder
4. If you feel you absolutely must run the tests, then run cd tests && pytest . instead of whatever you're doing now.

Thoughts?