fix clippy

Author: elpiel

adview-manager/src/lib.rs

@@ -154,7 +154,7 @@ pub fn apply_selection(campaigns: &[MarketChannel], options: &AdViewManagerOptio
 }
 
 fn is_video(ad_unit: &AdUnit) -> bool {
-    ad_unit.media_mime.split('/').nth(0) == Some("video")
+    ad_unit.media_mime.split('/').next() == Some("video")
 }
 
 fn calculate_target_score(a: &[TargetingTag], b: &[TargetingTag]) -> TargetingScore {

primitives/src/big_num.rs

@@ -1,5 +1,4 @@
 use std::convert::TryFrom;
-use std::error::Error;
 use std::iter::Sum;
 use std::ops::{Add, AddAssign, Div, Mul, Sub};
 use std::str::FromStr;
@@ -195,7 +194,7 @@ impl TryFrom<&str> for BigNum {
 
     fn try_from(num: &str) -> Result<Self, Self::Error> {
         let big_uint = BigUint::from_str(&num)
-            .map_err(|err| super::DomainError::InvalidArgument(err.description().to_string()))?;
+            .map_err(|err| super::DomainError::InvalidArgument(err.to_string()))?;
 
         Ok(Self(big_uint))
     }

primitives/src/config.rs

@@ -4,7 +4,6 @@ use lazy_static::lazy_static;
 use serde::{Deserialize, Serialize};
 use serde_hex::{SerHex, StrictPfx};
 use std::fs;
-use toml;
 
 lazy_static! {
     static ref DEVELOPMENT_CONFIG: Config =