There isn't a way to hide bank feed transactions in MYOB Essentials. If you'd like to delete them, you can e-mail our Bank Feeds team at firstname.lastname@example.org with your serial number, MYOB Essentials file name, and the date ranges of the bank feeds you'd like to delete. Please note that this will delete all the bank feeds that fall on the given dates - i.e. you cannot pick and choose what transactions on a certain date you'd like deleted.
If you imported the bank feeds statement as a .QIF file, this can be deleted by going to Banking > Bank Transactions > Import History.
Do let us know how you go, and feel free to post again anytime you require.