lib/Lock.js
function deleteNode(lock, lockPath, callback) {
  lock.client
    .delete()
    .guaranteed()
    .forPath(lockPath, callback);
}
function deleteNode(lock, lockPath, callback) {
  lock.client
    .delete()
    .guaranteed()
    .forPath(lockPath, callback);
}
function deleteNode ( lock , lockPath , callback ) { lock . client . delete ( ) . guaranteed ( ) . forPath ( lockPath , callback ) ; }
Guaranteed node deletion.

@private
@param {Lock} lock Lock instance
@param {String} lockPath
@param {Function} [callback] Callback function: `(err)`
Guaranteed node deletion .