Remove setuptools from install_requires

[remcohaszing]

This package simply doesn't require setuptools for installation.

• When installing from a wheel, setuptools isn't needed.
• When installing from an sdist and setuptools isn't installed, setup.py will fail to import setuptools on line 1.

[huxuan]

Hi @elijahandrews, would you consider this pull request or similar refinement?

I encountered a related issue when have setuptools in constraint file, new version of pip will complain the following error. Remove it or adding a loose constraint, e.g., setuptools>=50.0.0 should fix the issue.

ERROR: Cannot install flake8-blind-except==0.2.0 because these package versions have conflicting dependencies.

The conflict is caused by:
    flake8-blind-except 0.2.0 depends on setuptools
    The user requested (constraint) setuptools==50.3.1

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts

[elijahandrews]

Thanks! Sorry I let this sit for a while, merging now.

[elijahandrews]

Thanks! Sorry I let this sit for a while, merging now.

[elijahandrews]

This has been released in version 0.2.1