gh-131152: Remove unused imports from Tools/{build,wasm} (#131155)

Author: vstinner

Tools/build/generate-build-details.py

@@ -10,12 +10,6 @@
 import os
 import sys
 import sysconfig
-import traceback
-import warnings
-
-
-if False:  # TYPE_CHECKING
-    pass
 
 
 def version_info_to_dict(obj):  # (object) -> dict[str, Any]

Tools/wasm/emscripten/web_example/wasm_assets.py

@@ -12,7 +12,6 @@
 
 import argparse
 import pathlib
-import shutil
 import sys
 import sysconfig
 import zipfile