In the Logic Pro Tempo List, click the Additional Info button.
All tempo change events, including those located on the tempo curve, are displayed in the Tempo List.
In Logic Pro, do one of the following:
Click the tempo change event with the Eraser tool.
Select the tempo change event, then choose Edit > Delete (or press Delete).
In Logic Pro, choose Options > Granularity from the local Tempo List menu, then choose the note value from the submenu.
Download the guides:
Logic Pro User Guide: PDF
Logic Pro Effects: PDF