Addressing @bnoordhuis comments

doc/api/cluster.md

@@ -338,8 +338,8 @@ added: v6.0.0
 
 * {boolean}
 
-This property is `true` if the worker exited due to `.kill()` or
-`.disconnect()`. If the worker exited any other way, it is `false`. If the
+This property is `true` if the worker exited due to `.disconnect()`.
+If the worker exited any other way, it is `false`. If the
 worker has not exited, it is `undefined`.
 
 The boolean [`worker.exitedAfterDisconnect`][] allows distinguishing between
@@ -430,7 +430,7 @@ the `worker.process`, and once disconnected, killing with `signal`. In the
 worker, it does it by killing the process with `signal`.
 
 The `kill()` function kills the worker process without waiting for a graceful
-disconnect, it have the same behavior of `worker.process.kill()`.
+disconnect, it has the same behavior as `worker.process.kill()`.
 
 This method is aliased as `worker.destroy()` for backwards compatibility.
 

test/parallel/test-cluster-worker-kill-signal.js

@@ -1,24 +1,3 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
 'use strict';
 // test-cluster-worker-kill-signal.js
 // verifies that when we're killing a worker using Worker.prototype.kill