fix: Remove _version.py from git tracking (auto-generated by setuptools-scm)

This file should not be version controlled as it's automatically
generated by setuptools-scm during builds based on git tags.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -86,3 +86,4 @@ docs/_templates/
 
 # Temporary downloads
 temp_downloads/
+src/deltaglider/_version.py

src/deltaglider/_version.py

@@ -1,34 +0,0 @@
-# file generated by setuptools-scm
-# don't change, don't track in version control
-
-__all__ = [
-    "__version__",
-    "__version_tuple__",
-    "version",
-    "version_tuple",
-    "__commit_id__",
-    "commit_id",
-]
-
-TYPE_CHECKING = False
-if TYPE_CHECKING:
-    from typing import Tuple
-    from typing import Union
-
-    VERSION_TUPLE = Tuple[Union[int, str], ...]
-    COMMIT_ID = Union[str, None]
-else:
-    VERSION_TUPLE = object
-    COMMIT_ID = object
-
-version: str
-__version__: str
-__version_tuple__: VERSION_TUPLE
-version_tuple: VERSION_TUPLE
-commit_id: COMMIT_ID
-__commit_id__: COMMIT_ID
-
-__version__ = version = '4.0.1.dev1'
-__version_tuple__ = version_tuple = (4, 0, 1, 'dev1')
-
-__commit_id__ = commit_id = 'gdd39595c6'