cleanup unused pip packages (#22947)

* cleanup unused pip packages

* fix linter
old-commit-hash: f1c77f97b934fac877230d9438fb4a15d1813c52

tools/lib/framereader.py

@@ -6,10 +6,10 @@ import struct
 import subprocess
 import tempfile
 import threading
+from enum import IntEnum
 from functools import wraps
 
 import numpy as np
-from aenum import Enum
 from lru import LRU
 
 import _io
@@ -41,7 +41,7 @@ class DoNothingContextManager:
     pass
 
 
-class FrameType(Enum):
+class FrameType(IntEnum):
   raw = 1
   h265_stream = 2