To remove a contact from your profile:

From the App:

1. Go to the Roster Tab

2. Click Your name on the roster

3. Press 'Edit'

4. Find the contact you would like to remove and press the pencil beside their name

5. Press Delete

From the Web:

1. Press the 'Roster' Tab

2. Click on the contact you would like to delete from the contact column

3. Press Remove in the upper right and confirm