Setup extra "complete" no longer exists, but is mentioned in contribution docs

[alexander-held]

Summary

The "complete" setup extra no longer exists, but the contributing docs mention it. Should presumably be replaced by "all"

Documentation Page Link

https://github.com/scikit-hep/pyhf/blob/main/CONTRIBUTING.md#installing-the-development-environment

Code of Conduct

• I agree to follow the Code of Conduct

[alexander-held]

This also affects https://scikit-hep.org/pyhf/development.html.

[matthewfeickert]

Yeah, I had left this as is until we figured out how to do developer environments in hatch in #2096 but I can amend this now and then revise it again if needed.

[matthewfeickert]

Should presumably be replaced by "all"

Not quite. We made all to be user facing

pyhf/pyproject.toml

Line 80 in 2b168b7

all = ["pyhf[backends,xmlio,contrib,shellcomplete]"]

while complete used to install all the developer dependencies as well. That currently doesn't exist anymore.