remove spurious autoflake exclude line

Author: graingert

.pre-commit-config.yaml

@@ -45,7 +45,6 @@ repos:
     rev: v1.4
     hooks:
       - id: autoflake
-        exclude: &fixtures tests/functional/|tests/input|tests/extensions/data|tests/regrtest_data/|tests/data/
         args:
           - --in-place
           - --remove-all-unused-imports