doc: remove unnecessary bind(this)

PR-URL: #4797
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Chris Dickinson <[email protected]>
Reviewed-By: Roman Reiss <[email protected]>

Author: wKich

doc/api/process.markdown

@@ -693,7 +693,7 @@ function MyThing(options) {
 
   process.nextTick(() => {
     this.startDoingStuff();
-  }.bind(this));
+  });
 }
 
 var thing = new MyThing();