Delete downloaded iOS update file on iPhone 15

I have an iPhone 15 with iOS 18.7.2 that runs perfectly fine. It was set to automatically update and downloaded the iOS 26.1 update. I haven't installed it as I am not ready for iOS 26. From what I've seen and read, I don't think iOS 26 is read for me, either. My question is this: is there a way to delete the unused update file from my phone and wait until I am ready for iOS 26?