I've done a quick search for you. If you're looking at doing the History (Renaissance/Modern and Modern) course, then the standard offer is AAA including history. You will be fine if you drop the EPQ, but remember your EPQ can help make you stand out to universities and you might need this especially with the more competitive universities such as Warwick.
You will definitely be considered by the university based on your predicted grades, but remember to shine in your personal statement. In reality, you shouldn't need your EPQ to get into the university. Many schools and colleges don't even offer their students the opportunity to do it.
Good luck, and if you're really worried you should email the Warwick History admissions team.