remove if-clause for importing importlib.metadata

Author: rocco8773

plasmapy_sphinx/__init__.py

@@ -73,10 +73,7 @@
 if sys.version_info < (3, 8):  # coverage: ignore
     raise ImportError("plasmapy_sphinx does not support Python < 3.8")
 
-if sys.version_info >= (3, 8):
-    from importlib.metadata import version, PackageNotFoundError
-else:
-    from importlib_metadata import version, PackageNotFoundError
+from importlib.metadata import version, PackageNotFoundError
 
 from plasmapy_sphinx import autodoc, automodsumm, directives, utils