pylint - dealt with unnecessary-pass warning

.pylintrc

@@ -114,7 +114,6 @@ disable=#####################################
 
         logging-format-interpolation,
 
-        unnecessary-pass,
         cyclic-import,
 
         # These are hard to spot without linting, but easy to fix

buildstream/utils.py

@@ -255,7 +255,7 @@ def safe_copy(src, dest, *, result=None):
         # over extended file attributes.
         if result:
             result.failed_attributes.append(dest)
-        pass
+
     except shutil.Error as e:
         raise UtilError("Failed to copy '{} -> {}': {}"
                         .format(src, dest, e)) from e