The copyright and license notice is already in the LICENSE file. There
is no justifiable reason to also require that it be included in every
file, since the individual files are not individually distributed except
as part of the entire package.
Check that `listeners` is actually an array before trying to manipulate it
because it won't be if no regular event listeners have been registered yet
but there are 'removeListener' event listeners.
When removeAllListeners is called, the listeners array
is deleted to maintain compatibility with v0.6.
Reverts "events: don't delete the listeners array"
This reverts commit 78dc13fbf9.
Conflicts:
test/simple/test-event-emitter-remove-all-listeners.js