[ethcore]: rustc_hex not longer optional

Used by `ethcore/client/client` when importing blocks

Author: niklasad1

ethcore/Cargo.toml

@@ -54,7 +54,7 @@ rand_xorshift = "0.1.1"
 rayon = "1.1"
 rlp = "0.4.0"
 rlp_derive = { path = "../util/rlp-derive" }
-rustc-hex = { version = "1", optional = true }
+rustc-hex = "1"
 serde = "1.0"
 serde_derive = "1.0"
 snapshot = { path = "snapshot" }
@@ -93,6 +93,7 @@ rlp_compress = { path = "../util/rlp-compress" }
 rustc-hex = "1"
 serde_json = "1.0"
 stats = { path = "../util/stats" }
+pod = { path = "pod" }
 tempdir = "0.3"
 trie-standardmap = "0.15.0"
 
@@ -135,7 +136,6 @@ test-helpers = [
     "kvdb-rocksdb",
     "macros",
     "pod",
-    "rustc-hex",
     "tempdir",
     "basic-authority/test-helpers"
  ]

ethcore/src/lib.rs

@@ -81,6 +81,7 @@ extern crate patricia_trie_ethereum as ethtrie;
 extern crate rand;
 extern crate rayon;
 extern crate rlp;
+extern crate rustc_hex;
 extern crate serde;
 extern crate snapshot;
 extern crate spec;
@@ -126,8 +127,6 @@ extern crate pod;
 extern crate blooms_db;
 #[cfg(any(test, feature = "env_logger"))]
 extern crate env_logger;
-#[cfg(any(test, feature = "test-helpers"))]
-extern crate rustc_hex;
 #[cfg(test)]
 extern crate serde_json;
 #[cfg(any(test, feature = "tempdir"))]