Remove used optional dependency
@@ -25,7 +25,6 @@ num-traits = { version = "0.2.6", optional = true }
proc-macro2 = "1"
quote = "1"
serde = { version = "1.0", optional = true, features = ["derive"] }
-serde_derive = { version = "1.0", optional = true }
serde_json = { version = "1.0", optional = true }
serde_yaml = { version = "0.8", optional = true }
syn = "1"
