If for any reason, you need to remove an influencer from a campaign or assignment, just log into your account, click on the campaign, find the influencer you want to remove, and hover over the far right, next to their name. Three dots will appear along with three options.
To remove them, just click on "Remove this influencer?"
**IMPORTANT: If you remove an influencer, you also remove their report. This can't be undone (without re-doing the whole invite process).