You will need to:

• Tap My Accounts
  • Tap View under the Actions section (you will need to scroll right on the MetaTrader account you would like to remove).

• Tap the three dots and select Delete Account.

A notification will pop-up asking you to confirm the removal of the account. 

Please note: This is an irreversible action. You will also not be able to remove an account with a negative balance until the account/s have been brought back to a Zero.