Minor lint comments (#1166)

src/reader/mod.rs

@@ -94,7 +94,7 @@ impl IndexReaderBuilder {
         }
         Ok(IndexReader {
             inner: inner_reader_arc,
-            watch_handle_opt,
+            _watch_handle_opt: watch_handle_opt,
         })
     }
 
@@ -167,7 +167,7 @@ impl InnerIndexReader {
 #[derive(Clone)]
 pub struct IndexReader {
     inner: Arc<InnerIndexReader>,
-    watch_handle_opt: Option<WatchHandle>,
+    _watch_handle_opt: Option<WatchHandle>,
 }
 
 impl IndexReader {

src/snippet/mod.rs

@@ -16,7 +16,6 @@ pub struct FragmentCandidate {
     score: Score,
     start_offset: usize,
     stop_offset: usize,
-    num_chars: usize,
     highlighted: Vec<Range<usize>>,
 }
 
@@ -31,7 +30,6 @@ impl FragmentCandidate {
             score: 0.0,
             start_offset,
             stop_offset: start_offset,
-            num_chars: 0,
             highlighted: vec![],
         }
     }