Remove duplicated line

Author: dvdplm

uint/tests/uint_tests.rs

@@ -321,7 +321,6 @@ fn uint256_mul32() {
 #[test]
 #[allow(deprecated)]
 fn uint256_mul32_old() {
-	assert_eq!(U256::from(0u64).mul_u32(2), U256::from(0u64));
 	assert_eq!(U256::from(0u64).mul_u32(2), U256::from(0u64));
 	assert_eq!(U256::from(1u64).mul_u32(2), U256::from(2u64));
 	assert_eq!(U256::from(10u64).mul_u32(2), U256::from(20u64));