For continuity and follow-up reasons it is not possible to delete a Work log. Instead if it has been entered by mistake, has faulty data or needs to be removed for some other reason you Revoke it. It can be seen as a deactivation of the entry.
When you Revoke work log you must fill in the canceling form, stating revoke reason. After revoking work log, it get status Revoked and new option Reason for Revoking will appear in dropdown action in table. Clicking this button displays popup with revoke reason.