Fix clippy #6388

Job	Run time
Check minimal versions	31s
MSRV	50s
Test (nightly)	1m 57s
Test (beta)	2m 11s
Test (no gateway)	1m 29s
Test (macOS)	3m 10s
Examples	3m 36s
Test (stable)	2m 5s
Test (Windows)	5m 20s
Test (unstable Discord API features)	2m 39s
Test (unstable API + typesize, default unstable_discord_api typesize, true)	1m 18s
Test (chrono, chrono)	48s
Test (unstable Discord API (no default features), unstable_discord_api, true)	40s
Build docs	44s
Test (simd-json)	2m 11s
Test (no default features)	48s
Test (builder without model, builder, true)	45s
Test (native-tls)	1m 53s
Test (no cache)	1m 52s
	34m 47s

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