Auto merge of #8416 - est31:remove_derive, r=alexcrichton
Auto merge of #8416 - est31:remove_derive, r=alexcrichton

Remove unused serde_derive dependency from the crates.io crate

nipunn1313/cargo,rustyhorde/cargo,tsurai/cargo,nipunn1313/cargo,tsurai/cargo,eminence/cargo,eminence/cargo,tsurai/cargo,tshepang/cargo,rust-lang/cargo,rust-lang/cargo,tsurai/cargo,tsurai/cargo,rust-lang/cargo,rustyhorde/cargo,nipunn1313/cargo,tshepang/cargo,tshepang/cargo,eminence/cargo,tshepang/cargo,nipunn1313/cargo,rustyhorde/cargo,rustyhorde/cargo,rust-lang/cargo,eminence/cargo