Remove old tickets from apple wallet

Try this:

Go to Settings -> tap on your name (Apple ID, iCloud, Media and Purchases) -> scroll to & tap Payment & Shipping -> Login required.

Then select Apple Pay -> Click Open Wallet.

Now you should see all your cards and passes

Select the one that you want to remove. 

Then tap the More button (the 3-dots in a circle) at the top right.

Select the option -> ‘Remove Pass’. 

See -> Remove passes from Apple Wallet

Remove passes from Apple Wallet - Apple Support