removing unnecessary lifetime

src/renderer/renderer.rs

@@ -136,7 +136,7 @@ mod tests {
         }
     }
 
-    fn do_the_walk<'a>(c: &'a (dyn Walkable<Output = &str> + 'a), path: &str) -> &'a str {
+    fn do_the_walk<'a>(c: &'a (dyn Walkable<Output = &str>), path: &str) -> &'a str {
         c.walk(path)
     }