WTF is this file doing here (#622)

src/query/query_parser/stemmer.rs

@@ -1,44 +0,0 @@
-use std::sync::Arc;
-use stemmer;
-
-
-pub struct StemmerTokenStream<TailTokenStream> 
-    where TailTokenStream: TokenStream {
-    tail: TailTokenStream,
-    stemmer: Arc<stemmer::Stemmer>,
-}
-
-impl<TailTokenStream> TokenStream for StemmerTokenStream<TailTokenStream>
-    where TailTokenStream: TokenStream {
-
-    fn token(&self) -> &Token {
-        self.tail.token()
-    }
-    
-    fn token_mut(&mut self) -> &mut Token {
-        self.tail.token_mut()
-    }
-
-    fn advance(&mut self) -> bool {
-        if self.tail.advance() {
-            // self.tail.token_mut().term.make_ascii_lowercase();
-            let new_str = self.stemmer.stem_str(&self.token().term);
-            true
-        }
-        else {
-            false
-        }
-    }
-
-}
-
-impl<TailTokenStream> StemmerTokenStream<TailTokenStream>
-    where TailTokenStream: TokenStream {
-    
-    fn wrap(stemmer: Arc<stemmer::Stemmer>, tail: TailTokenStream) -> StemmerTokenStream<TailTokenStream> {
-        StemmerTokenStream {
-            tail,
-            stemmer,
-        }
-    } 
-}