Remove python 3.8 check in init.py

src/ophyd_async/__init__.py

@@ -1,9 +1,4 @@
-import sys
-
-if sys.version_info < (3, 8):
-    from importlib_metadata import version  # noqa
-else:
-    from importlib.metadata import version  # noqa
+from importlib.metadata import version  # noqa
 
 __version__ = version("ophyd_async")
 del version

src/ophyd_async/epics/demo/__init__.py

@@ -1,8 +1,14 @@
 """Demo EPICS Devices for the tutorial"""
 
 import asyncio
+import atexit
+import random
+import string
+import subprocess
+import sys
 import time
 from enum import Enum
+from pathlib import Path
 from typing import Callable, List, Optional
 
 import numpy as np
@@ -124,12 +130,6 @@ def start_ioc_subprocess() -> str:
     """Start an IOC subprocess with EPICS database for sample stage and sensor
     with the same pv prefix
     """
-    import atexit
-    import random
-    import string
-    import subprocess
-    import sys
-    from pathlib import Path
 
     pv_prefix = "".join(random.choice(string.ascii_uppercase) for _ in range(12)) + ":"
     here = Path(__file__).absolute().parent