Merge branch 'jk/fast-export-cleanup'

Code clean-up. * jk/fast-export-cleanup: fast-export: drop unused parameter from anonymize_commit_message() fast-export: drop data parameter from anonymous generators fast-export: de-obfuscate --anonymize-map handling fast-export: factor out anonymized_entry creation fast-export: simplify initialization of anonymized hashmaps fast-export: drop const when storing anonymized values