Remove unneeded __future__ annotations import

Python 3.14 supports X | Y union syntax natively (PEP 604), so the
lazy annotation evaluation from PEP 563 is no longer required.

Author: mrbiggred

scripts/optimize_image.py

@@ -10,8 +10,6 @@
     python scripts/optimize_image.py --quality 85 --max-width 1600 image.png
 """
 
-from __future__ import annotations
-
 import argparse
 import sys