Remove 'allow(zero_prefixed_literal)' attribute
//!
//! For more information see the project readme.
-#![deny(missing_debug_implementations)]
-#![deny(missing_docs)]
-
-#![cfg_attr(feature="cargo-clippy", allow(zero_prefixed_literal))]
+#![deny(missing_debug_implementations, missing_docs)]
#![cfg_attr(feature="flame_profile", feature(plugin, custom_attribute))]
#![cfg_attr(feature="flame_profile", plugin(exonum_flamer))]
