Remove unused serde_derive dependency

Author: est31

crates/crates-io/Cargo.toml

@@ -18,6 +18,5 @@ curl = "0.4"
 anyhow = "1.0.0"
 percent-encoding = "2.0"
 serde = { version = "1.0", features = ['derive'] }
-serde_derive = "1.0"
 serde_json = "1.0"
 url = "2.0"