unused parameters in parsers #341

Job	Run time
windows-msvc-shared (AVRO)	3m 38s
windows-msvc-shared (CBOR)	2m 11s
windows-msvc-shared (FLEXBUFFERS)	3m 42s
windows-msvc-shared (CAPNPROTO)	4m 16s
windows-msvc-shared (XML)	2m 9s
windows-msvc-shared (JSON)	2m 4s
windows-msvc-shared (TOML)	2m 18s
windows-msvc-shared (MSGPACK)	2m 13s
windows-msvc-shared (UBJSON)	2m 42s
windows-msvc-shared (YAML)	2m 38s
windows-msvc-shared (PARQUET)	48m 58s
windows-msvc (AVRO)	3m 15s
windows-msvc (FLEXBUFFERS)	3m 50s
windows-msvc (MSGPACK)	2m 15s
windows-msvc (YAML)	2m 37s
windows-msvc (PARQUET)	38m 53s
windows-msvc (benchmarks)	44m 4s
windows-msvc (CBOR)	2m 24s
windows-msvc (CAPNPROTO)	5m 10s
windows-msvc (UBJSON)	2m 6s
windows-msvc (XML)	2m 18s
windows-msvc (TOML)	2m 58s
windows-msvc (JSON)	2m 18s
	3h 8m 57s

Provide feedback