net: remove typo in setTimeout comment

This commit removes `lear` from the code comment in setTimeout. I'm not
100% sure this is a typo but I've struggled to think what it could mean.
Hopefully someone else might be able to shed some light on this.

PR-URL: #20576
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/net.js

@@ -411,7 +411,7 @@ Socket.prototype.setTimeout = function(msecs, callback) {
   // Type checking identical to timers.enroll()
   msecs = validateTimerDuration(msecs);
 
-  // Attempt to clear an existing timer lear in both cases -
+  // Attempt to clear an existing timer in both cases -
   //  even if it will be rescheduled we don't want to leak an existing timer.
   clearTimeout(this[kTimeout]);