Remove unused coveralls requirement

[cjmayo]

Added in:
bb93ee7 ("Test python 3.5, and use coveralls and pylint.", 2016-03-10)

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Looks like it was added for use with Travis. If we want to use a similar service on GitHub then there are Actions available.

[cjmayo]

So, it's still in the txt files??? Are they not generated here?

[samuelhwilliams]

They need to be regenerated (pip-compiled) locally, it's not automatic

[cjmayo]

I see the tox environment, but when in the top directory of a new clone I run tox -e update-requirements I'm getting:

update-requirements run-test: commands[0] | pip-compile build.in -q -U
Usage: pip-compile [OPTIONS] [SRC_FILES]...
Try 'pip-compile -h' for help.

Error: Invalid value for '[SRC_FILES]...': Path 'build.in' does not exist.

Ubuntu 20.04.

[samuelhwilliams]

I think that's for a different purpose (but is also broken and needs fixing)

To pin new requirements - pip-compile <file> - which needs pip-tools available

[cjmayo]

OK. That's fixed now.

[cjmayo]

update-requirements run-test: commands[0] | pip-compile build.in -q -U
Usage: pip-compile [OPTIONS] [SRC_FILES]...
Try 'pip-compile -h' for help.

Error: Invalid value for '[SRC_FILES]...': Path 'build.in' does not exist.

That's with Ubuntu 20.04's own tox-3.13, works fine with tox 4.18.1

[samuelhwilliams]

Somewhat expected - that tox command uses change_dir which was only added in tox v4+.

Possibly dev.in could be updated to clarify this.

Also we possibly want another tox command - compile-requirements, which doesn't force update all of the packages. This for where we may just be adding a package to one or more of the .in files.