Simplify versioning

Trying to get a distinct version number for each unreleased Git commit is probably no longer worth the trouble (of pip's buggy packaging of `get_version.py` etc.) now that Hy isn't such a moving target. For each release, I'll just update `hy.__version__` and the version in `setup.py`, then revert those changes in the following commit.

.gitignore

@@ -1,4 +1,3 @@
-/hy/version.py
 *.pyc
 .*.sw?
 *hy*egg*

docs/conf.py

@@ -14,14 +14,12 @@
 for c in (SD.RemovedInSphinx60Warning, SD.RemovedInSphinx70Warning):
     warnings.filterwarnings('ignore', category = c)
 
-from get_version import __version__ as hy_version
-
 project = 'Hy'
 copyright = '%s the authors' % time.strftime('%Y')
-html_title = f'Hy {hy_version} manual'
-version = '.'.join(hy_version.split('.')[:-1])
+html_title = f'Hy {hy.__version__} manual'
+version = '.'.join(hy.__version__.split('.')[:-1])
   # The short dotted version identifier
-release = hy_version
+release = hy.__version__
   # The full version identifier, including alpha, beta, and RC tags
 
 hyrule_version = 'doc-testing'

hy/__init__.py

@@ -1,7 +1,4 @@
-try:
-    from hy.version import __version__
-except ImportError:
-    __version__ = "unknown"
+__version__ = 'unreleased'
 
 
 def _initialize_env_var(env_var, default_val):

setup.py

@@ -12,7 +12,6 @@
 import os
 
 import fastentrypoints  # Monkey-patches setuptools.
-from get_version import __version__
 from setuptools import find_packages, setup
 from setuptools.command.install import install
 
@@ -42,11 +41,7 @@ def run(self):
 
 setup(
     name=PKG,
-    version=(
-        None
-        if __version__ == "unknown"
-        else __version__
-    ),
+    version='0.0.0',
     setup_requires=["wheel"] + requires,
     install_requires=requires,
     python_requires=">= 3.8, < 3.13",
@@ -61,7 +56,6 @@ def run(self):
     package_data={
         "": ["*.hy"],
     },
-    data_files=[("get_version", ["get_version.py"])],
     author="Paul Tagliamonte",
     author_email="[email protected]",
     long_description=long_description,