I recently had this issue when I wanted to remove my bank pin as it became more annoying than useful.
So you're probably thinking how can I do this? Look no further.
First off gotta give credit where it's due shoutout to @Durag & @HASH ROSIN for helping me resolve my issue.
Step 1 - Go to edgeville bank and select the talk to option on the banker to get to this dialogue.
Step 2 - click continue
Step 3 - Select Yes Please
Step 4 - Just simply click Exit and wallah your bank pin has now been removed.
I don't post much but I found this extremely useful so I'm posting here for anyone else who is confused and interested in removing their pin.
Cheers, A Pleb