0.5.x: Remove everything deprecated #2862

Job	Run time
timezones (ubuntu-latest, ACST-9:30)	1m 18s
timezones (ubuntu-latest, EST4)	1m 13s
alternative_targets (ubuntu-latest, wasm32-unknown-emscripten)	16s
timezones (ubuntu-latest, UTC0)	1m 21s
alternative_targets (ubuntu-latest, aarch64-apple-ios)	9s
timezones (ubuntu-latest, Asia/Katmandu)	1m 24s
alternative_targets (ubuntu-latest, aarch64-linux-android)	21s
timezones (macos-latest, ACST-9:30)	1m 22s
timezones (macos-latest, EST4)	1m 24s
timezones (macos-latest, UTC0)	1m 3s
check-docs	22s
cross-targets (x86_64-sun-solaris)	1m 11s
timezones (macos-latest, Asia/Katmandu)	58s
timezones (windows-latest, ACST-9:30)	1m 47s
cross-tests (ubuntu-latest)	1m 55s
features_check (ubuntu-latest)	5m 25s
no_std (ubuntu-latest, thumbv6m-none-eabi)	9s
features_check (macos-latest)	20m 20s
no_std (ubuntu-latest, x86_64-fortanix-unknown-sgx)	10s
rust_msrv (ubuntu-latest)	1m 4s
timezones (windows-latest, EST4)	2m 8s
features_check (windows-latest)	8m 57s
timezones (windows-latest, UTC0)	2m 9s
rust_versions (ubuntu-latest, stable)	1m 16s
timezones (windows-latest, Asia/Katmandu)	1m 48s
test_wasi (ubuntu-latest, wasm32-wasi)	34s
rust_versions (ubuntu-latest, beta)	1m 4s
test_wasm (ubuntu-latest)	33s
rust_versions (ubuntu-latest, nightly)	1m 6s
	1h 2m 47s

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