Remove try.

Ignore critierion folder.

.gitignore

@@ -1,3 +1,5 @@
 /target/
 
 Cargo.lock
+
+/.criterion/

src/lib.rs

@@ -402,7 +402,7 @@ impl<'de> Deserialize<'de> for BitSet {
             {
                 let mut values = BitSet::new();
 
-                while let Some(value) = try!(seq.next_element()) {
+                while let Some(value) = seq.next_element()? {
                     BitSet::insert(&mut values, value);
                 }