Fix remote candidate deduplication #1985

Job	Run time
lint	4m 21s
test (ubuntu-latest, stable)	5m 55s
cargo-deny (aarch64-apple-ios)	19s
test (ubuntu-latest, beta)	6m 0s
cargo-deny (aarch64-linux-android)	20s
test (ubuntu-latest, 1.65.0)	8m 4s
cargo-deny (i686-pc-windows-gnu)	22s
test (macos-latest, stable)	1m 4s
cargo-deny (i686-pc-windows-msvc)	21s
test (macos-latest, beta)	5m 20s
cargo-deny (i686-unknown-linux-gnu)	22s
test (macos-latest, 1.65.0)	8m 33s
cargo-deny (wasm32-unknown-unknown)	22s
test (windows-latest, stable)	12m 3s
test (windows-latest, beta)	11m 37s
cargo-deny (x86_64-apple-darwin)	20s
test (windows-latest, 1.65.0)	14m 26s
cargo-deny (x86_64-apple-ios)	21s
cargo-deny (x86_64-pc-windows-gnu)	21s
cargo-deny (x86_64-pc-windows-msvc)	19s
cargo-deny (x86_64-unknown-linux-gnu)	17s
cargo-deny (x86_64-unknown-redox)	20s
	1h 21m 27s

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