Go to the Projects/Workspaces tab. Note: If you don't have this, go to the application menu on the left (see image below) and click on Projects/Workspaces - this will add it as a tab in TD.

Find the project in the left-navigation listing
Expand the project so you can see Manage and click Manage
A new menu will pop up to the right
Select Resources
Select the green Actions button
Select Remove Resources
Under Remove, use the drop-down to select the appropriate name
Under Delegate To, select yourself (or the project manager/alternate)
Leave the default options selected
Click Save