correct typo for respond func

Author: devaroop

lib/redmine_sidekiq/configure.rb

@@ -25,7 +25,7 @@ class Configure
     end
 
     Sidekiq::Extensions::Klass.module_eval do
-      remove_method :delay if respond_to(:delay)
+      remove_method :delay if respond_to?(:delay)
     end
 
   end