Slightly simplify CLI version logic

Author: maresb

backend/src/hatchling/cli/version/__init__.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import argparse
-from typing import Any, cast
+from typing import Any
 
 
 def version_impl(
@@ -21,11 +21,11 @@ def version_impl(
  plugin_manager = PluginManager()
  metadata = ProjectMetadata(root, plugin_manager)
 
- if 'version' in metadata.config.get('project', {}):
+ static_version = metadata.core.version
+ if static_version is not None:
  if desired_version:
  app.abort('Cannot set version when it is statically defined by the `project.version` field')
  else:
- static_version = cast(str, metadata.core.version)
  app.display(static_version)
  return