Removing Users from Workspaces, Folders, and Files
To remove a user's access to a workspace, file, or folder, click the Share button for the item you would like to remove them from. Once the share dialog appears, click the trash icon that shows up when hovering over the user in the list. This will immediately remove their access, even if they have not accepted their invitation yet.
Users can only be removed from the level they were originally invited at. For instance, if you invite someone to your workspace, they will also be listed as a user when looking at the Permissions & Sharing section for files and folders, but will only be able to be removed from the workspace share section where you originally invited them.
Removing Account - Level Users
Users at the Account-Level can only be removed from the Users tab found on the Home page.