pw_toolchain: Fix pylint findings

Addresses a few minor pylint findings in pw_toolchain's python module.

Change-Id: Ia04a2d40bf641287bb254752e3a93e77129f7bf2
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/30760
Commit-Queue: Armando Montanez <amontanez@google.com>
Pigweed-Auto-Submit: Armando Montanez <amontanez@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
diff --git a/pw_toolchain/py/pw_toolchain/copy_with_metadata.py b/pw_toolchain/py/pw_toolchain/copy_with_metadata.py
index 59fde19..0d1402f 100644
--- a/pw_toolchain/py/pw_toolchain/copy_with_metadata.py
+++ b/pw_toolchain/py/pw_toolchain/copy_with_metadata.py
@@ -17,7 +17,6 @@
 import logging
 import os
 import shutil
-import stat
 import sys
 
 _LOG = logging.getLogger(__name__)
@@ -34,8 +33,8 @@
             shutil.copytree(src, dest, symlinks=True)
         else:
             shutil.copy2(src, dest, follow_symlinks=False)
-    except:
-        _LOG.error('Error during copying procedure.')
+    except:  # pylint: disable=bare-except
+        _LOG.exception('Error during copying procedure.')
         return -1
 
     return 0