[MAINT] - Don't keep _version.py file in version control

[soapy1]

related to #969

As a pre req to taking up #861, clean up the _version.py file which should not be tracked in version control.

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[peytondmurray]

I like this, but is anyone using conda_store_server.__version__ right now? I guess as a workaround we can do something like

# conda_store_server/__init__.py

from importlib.metadata import version

__version__ = version(__package__)

if we need to...?

[soapy1]

The conda store version is meant to come from here https://github.com/conda-incubator/conda-store/blob/main/conda-store-server/conda_store_server/__init__.py#L17

As we move towards using setuptools-scm (and hatch-vcs), that'll look more like https://github.com/conda-incubator/conda-store/pull/861/files#diff-48a7f6b1b439ff32ff7b62092a2d6a49fb3c672e387714f659b6b492d22a3375R27.

Also want to call out this comment in the file

file generated by setuptools_scm
don't change, don't track in version control

[peytondmurray]

Oh you're right - let's get rid of this!