Optimize import.

Do not import whole functools just for reduce, import only reduce instead.

pyplumio/util.py

@@ -1,7 +1,7 @@
 """Contains various utility methods."""
 from __future__ import annotations
 
-import functools
+from functools import reduce
 import struct
 
 # Data type unpackers.
@@ -30,7 +30,7 @@ def unpack_string(data: bytearray, offset: int = 0) -> str:
 
 def bcc(data: bytes) -> int:
     """Return a block check character."""
-    return functools.reduce(lambda x, y: x ^ y, data)
+    return reduce(lambda x, y: x ^ y, data)
 
 
 def to_camelcase(text: str, overrides: dict[str, str] = None) -> str: