Remove stray 'for<'a>' of unused 'a lifetime

src/lua.rs

@@ -1063,7 +1063,7 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
     where
         A: FromLuaMulti<'lua>,
         R: ToLuaMulti<'lua>,
-        F: 'static + for<'a> FnMut(&'lua Lua, A) -> Result<R>,
+        F: 'static + FnMut(&'lua Lua, A) -> Result<R>,
     {
         Box::new(move |lua, args| {
             function(lua, A::from_lua_multi(args, lua)?)?.to_lua_multi(

src/tests.rs

@@ -910,7 +910,7 @@ fn should_not_compile() {
 
     // Should not allow self borrow of lua, it can change addresses
     globals.set("boom", lua.create_function(|_, _| {
-        lua.pack(lua.eval::<i32>("1 + 1", None)?)
+        lua.eval::<i32>("1 + 1", None)
     })).unwrap();
 }
 */