When you refer to “emitters” are you referring to drip irrigation emitters or spray heads as you mentioned in your first sentence? Either way, all you have to do it remove that valve wire from the irrigation controller so it’s not hooked up and that particular station will not run anymore. That’s much easier then ripping stuff out in my opinion and leaves you the flexibility for the future. I am curious what you’re going to grow for this dog park that will survive without irrigation, unless it’s going to be a dirt field.