how doI delete the app from updates?

alaska2018 wrote:

How do I delete the update app on a MacBook pro?

What are you asking here, a specific app? Delete it.

You do not have to update.

How to update the software on your Mac - Apple Support

Keep your Mac up to date - Apple Support

If your talking about this one you cannot! Maybe you do not want Catalina, I do not want it, but it will be needed to update Safari and/or Security as for Catalina I do not want it because I have 2 apps that will not run and there never will be an update for them, so I will stay on Mojave and iPhone iOS 12.4.1 until the moon turns blue.

If this is about the Catalina update you can from the Terminal.app stop the software update asking, copy and paste:

sudo softwareupdate --ignore "macOS Catalina"

then to squelch the Dock icon red badge notice, copy and paste:

defaults write com.apple.systempreferences AttentionPrefBundleIDs 0  && killall Dock