You can remove slices by
deleting them or by releasing them from the corresponding artwork.
To delete a slice, select the slice,
and press Delete. If the slice was created using the Object >
Slice > Make command, the corresponding artwork is deleted
at the same time. If you want to keep the corresponding artwork,
release the slice instead of deleting it.
To
delete all slices, choose Object > Slice >
Delete All. Slices created with the Object > Slice >
Make command are released, not deleted.
To
release a slice, select the slice and choose Object >
Slice > Release.