cargo: Clean up serde dependencies

There is no need to include serde_derive separately,
as it can be specified as serde feature instead.

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

arch/Cargo.toml

@@ -16,8 +16,7 @@ hypervisor = { path = "../hypervisor" }
 libc = "0.2.125"
 linux-loader = { version = "0.4.0", features = ["elf", "bzimage", "pe"] }
 log = "0.4.17"
-serde = { version = "1.0.137", features = ["rc"] }
-serde_derive = "1.0.137"
+serde = { version = "1.0.137", features = ["rc", "derive"] }
 thiserror = "1.0.31"
 versionize = "0.1.6"
 versionize_derive = "0.1.4"

arch/src/lib.rs

@@ -9,11 +9,10 @@
 
 #[macro_use]
 extern crate log;
-#[macro_use]
-extern crate serde_derive;
 
 #[cfg(target_arch = "x86_64")]
 use crate::x86_64::SgxEpcSection;
+use serde::{Deserialize, Serialize};
 use std::collections::BTreeMap;
 use std::fmt;
 use std::result;