Delete the take by doing one of the following:
Choose Delete Take from the Take Folder pop-up menu.
Click the take with the Eraser tool.
Press the Delete key.
In the Logic Pro
Choose Delete all other Comps from the Take Folder pop-up menu.
All comps, with the exception of the currently active comp, are deleted. (This command is available only when a take folder contains more than one comp and when a comp is active.)
Logic Pro User Guide: PDF
Logic Pro Effects: PDF