Remove the argument description in the docstrings of the test functions
We use the Google-style docstrings for the description of functions. These docstrings in general contain a list of function arguments and their description.
We agreed in the team that we will omit the arguments in docstrings of the test functions because all arguments are defined in conftest.py and a description can be found there. This will help to unclutter the test codes and reduce repeated descriptions of the same arguments.