Remove redundant imports.

src/buffer_proxy_iterator.rs

@@ -1,5 +1,4 @@
 use std::collections::VecDeque;
-use std::iter::Iterator;
 use std::ops::RangeInclusive;
 
 /// This iterator buffers characters until they can be determined to be clean of profanity.

src/trie.rs

@@ -2,7 +2,6 @@ use crate::feature_cell::FeatureCell;
 use crate::Map;
 use crate::Type;
 use lazy_static::lazy_static;
-use std::iter::FromIterator;
 use std::ops::Deref;
 
 lazy_static! {