Removed unnecessary std::move, fixes #533 (#540) #337

Job	Run time
windows-msvc-shared (CBOR)	8m 30s
windows-msvc-shared (MSGPACK)	4m 6s
windows-msvc-shared (AVRO)	7m 47s
windows-msvc-shared (JSON)	10m 1s
windows-msvc-shared (PARQUET)	39m 0s
windows-msvc-shared (TOML)	3m 58s
windows-msvc-shared (FLEXBUFFERS)	5m 34s
windows-msvc-shared (UBJSON)	7m 7s
windows-msvc-shared (XML)	4m 7s
windows-msvc-shared (CAPNPROTO)	8m 2s
windows-msvc-shared (YAML)	5m 11s
windows-msvc (benchmarks)	45m 47s
windows-msvc (JSON)	10m 3s
windows-msvc (AVRO)	7m 45s
windows-msvc (FLEXBUFFERS)	9m 53s
windows-msvc (YAML)	4m 6s
windows-msvc (UBJSON)	6m 49s
windows-msvc (TOML)	3m 38s
windows-msvc (CBOR)	8m 23s
windows-msvc (MSGPACK)	3m 56s
windows-msvc (CAPNPROTO)	8m 1s
windows-msvc (XML)	3m 55s
windows-msvc (PARQUET)	39m 2s
	4h 14m 41s

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