Address needless_lifetimes lint in decode_hex_escape
diff --git a/src/read.rs b/src/read.rs
index a9fda72..97f87cd 100644
--- a/src/read.rs
+++ b/src/read.rs
@@ -344,7 +344,7 @@
         }
     }
 
-    fn decode_hex_escape<'s>(&'s mut self) -> Result<u16> {
+    fn decode_hex_escape(&mut self) -> Result<u16> {
         let mut n = 0;
         for _ in 0..4 {
             match decode_hex_val(try!(next_or_eof(self))) {