Remove unneeded extern crate

zcash_primitives/src/jubjub/mod.rs

@@ -469,6 +469,8 @@ impl JubjubBls12 {
 
 #[test]
 fn test_jubjub_bls12() {
+    use hex_literal::hex;
+
     let params = JubjubBls12::new();
 
     tests::test_suite::<Bls12>(&params);

zcash_primitives/src/lib.rs

@@ -6,12 +6,7 @@
 // Catch documentation errors caused by code changes.
 #![deny(intra_doc_link_resolution_failure)]
 
-#[macro_use]
-extern crate lazy_static;
-
-#[cfg(test)]
-#[macro_use]
-extern crate hex_literal;
+use lazy_static::lazy_static;
 
 pub mod block;
 pub mod constants;

zcash_primitives/src/sapling.rs

@@ -6,6 +6,7 @@ use crate::{
     primitives::Note,
 };
 use ff::{BitIterator, PrimeField, PrimeFieldRepr};
+use lazy_static::lazy_static;
 use pairing::bls12_381::{Bls12, Fr, FrRepr};
 use rand_core::{CryptoRng, RngCore};
 use std::io::{self, Read, Write};