Fix clippy

Author: atuchin-m

src/filters/fb_network_builder.rs

@@ -173,7 +173,7 @@ impl<'a> FlatSerialize<'a, EngineFlatBuilder<'a>> for NetworkFilterListBuilder {
                         }
                     }
                     FilterTokens::Other(tokens) => {
-                        let best_token = token_frequencies.select_least_used_token(&tokens);
+                        let best_token = token_frequencies.select_least_used_token(tokens);
                         token_frequencies.record_usage(best_token);
                         store_filter(best_token);
                     }

src/filters/network.rs

@@ -886,7 +886,7 @@ impl NetworkFilter {
         let mut tokens_buffer = TokensBuffer::default();
         match self.get_tokens_optimized(&mut tokens_buffer) {
             FilterTokens::OptDomains(domains) => {
-                domains.into_iter().map(|domain| vec![*domain]).collect()
+                domains.iter().map(|domain| vec![*domain]).collect()
             }
             FilterTokens::Other(tokens) => vec![tokens.to_vec()],
             FilterTokens::Empty => vec![],