Deleting or emptying animation layers
You can delete all the keyframes from selected layers, or simply delete one layer or multiple layers at a time.
Note:
You can select multiple layers at a time by Ctrl-clicking each one or by Shift-clicking a range of layers.
To delete all keyframes from an animation layer:
Select the layer or layers with keys you want to delete.
Right-click one of the selected layers, then select Clear Animation on Layer from the context menu.
The layers no longer contain animation.
To delete selected animation layers:
Select the layer you want to delete. You can also Ctrl-click to select multiple layers.
Click the Delete button in the Animation Layer editor toolbar.
You can also right-click on one of the selected layers and select Delete from the context menu.
All selected layers are removed from the scene.