Remove `PingInteraction::guild_locale` field (#2578) #717

Job	Run time
Build docs	37s
Examples	4m 56s
Test (macOS)	4m 20s
Check minimal versions	39s
MSRV	0s
Test (nightly)	7m 7s
Test (stable)	5m 39s
Test (beta)	4m 23s
Test (Windows)	8m 5s
Test (native-tls)	6m 54s
Test (no default features)	52s
Test (no cache)	5m 8s
Test (no gateway)	2m 52s
Test (unstable Discord API features)	1m 47s
Test (simd-json)	6m 23s
Test (chrono, chrono)	1m 10s
Test (builder without model, builder, true)	29s
Test (unstable Discord API (no default features), unstable_discord_api, true)	36s
	1h 1m 57s

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