To remove a contact from auto-complete, please tap More... | Edit Profile, Groups & Contacts | Contacts | Search for the contact(s).
From here you have two options. Either you can remove the contact from displaying in your autocomplete list or remove the contact entirely.
- To remove the contact from appearing in the autocomplete bar, without deleting this contact - please disable Show this person in autocomplete.
- To remove this contact completely, please tap the 3 dot menu | Delete | Yes.