Drop dependency on parameterized

[FrostyX]

@hroncok warns us that we potentially might have problems with our dependency on parameterized. Maybe it will get dropped from Fedora. If we fully switch to pytest then we will not need parametrized at all, though.

[hroncok]

The package is pretty much broken with modern pytest due to wolever/parameterized#34 and the upstream seems to have faded away.

[praiskup]

Fixed by #91