Remove unnecessary Syntexes

examples/serde-syntex-example/Cargo.toml

@@ -10,7 +10,6 @@ nightly = ["serde_macros"]
 
 [build-dependencies]
 serde_codegen = { version = "^0.7.10", optional = true }
-syntex = "^0.33.0"
 
 [dependencies]
 serde = "^0.7.10"

examples/serde-syntex-example/build.rs

@@ -1,6 +1,5 @@
 #[cfg(not(feature = "serde_macros"))]
 mod inner {
-    extern crate syntex;
     extern crate serde_codegen;
 
     use std::env;