deps: remove `instant` #2650

Job	Run time
test_tao_macros	2m 52s
fmt check	4s
tests (windows, x86_64-pc-windows-msvc, windows-latest)	8m 3s
tests (ubuntu, x86_64-unknown-linux-gnu, ubuntu-latest)	4m 18s
tests (ubuntu-without-feat, x86_64-unknown-linux-gnu, ubuntu-latest, --no-default-features)	6m 45s
tests (macos, x86_64-apple-darwin, macos-latest)	4m 29s
tests (android, aarch64-linux-android, ubuntu-latest, apk --)	4m 18s
tests (ios, aarch64-apple-ios, macos-latest)	3m 19s
	34m 8s

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