When the Chutney test-network script ends, it displays warnings from the tor logs. It summarizes/filters them in the `show_warnings()` function in `tools/warnings.sh`. This function creates two files with `LOGS=$(mktemp)` and `FILTERED_LOGS=$(mktemp)` but never deletes them when it's done. The proposal is to add `rm "${LOGS}" "${FILTERED_LOGS}"` at the end of the function.