Fix remote candidate deduplication #1983

Job	Run time
lint	1m 11s
test (ubuntu-latest, stable)	1m 9s
test (ubuntu-latest, beta)	1m 8s
cargo-deny (aarch64-apple-ios)	22s
test (ubuntu-latest, 1.65.0)	1m 9s
cargo-deny (aarch64-linux-android)	21s
test (macos-latest, stable)	1m 10s
cargo-deny (i686-pc-windows-gnu)	22s
test (macos-latest, beta)	1m 11s
cargo-deny (i686-pc-windows-msvc)	22s
test (macos-latest, 1.65.0)	1m 11s
cargo-deny (i686-unknown-linux-gnu)	29s
test (windows-latest, stable)	44s
cargo-deny (wasm32-unknown-unknown)	18s
test (windows-latest, beta)	1m 8s
test (windows-latest, 1.65.0)	42s
cargo-deny (x86_64-apple-darwin)	19s
cargo-deny (x86_64-apple-ios)	22s
cargo-deny (x86_64-pc-windows-gnu)	24s
cargo-deny (x86_64-pc-windows-msvc)	21s
cargo-deny (x86_64-unknown-linux-gnu)	22s
cargo-deny (x86_64-unknown-redox)	22s
	15m 7s

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