Remove unnecessary dependencies

[youngjoon-lee]

Using cargo-udeps, I removed unnecessary dependencies. The udeps commands that I used are below:

cargo +nightly udeps --all --all-targets --no-default-features --tests --benches --features waku,metrics,gql
cargo +nightly udeps --all --all-targets --no-default-features --tests --benches --features libp2p,metrics,gql

I deleted dependencies that were the intersection of two results (which aren't used by both waku and libp2p).