fs,net: removed file descriptor for ready event (writestream)

removed file descriptor for ready event in fs streams and updated test case
to check only for ready event.

Fixes: nodejs#19304

Author: sameer-coder

lib/fs.js

@@ -2142,7 +2142,7 @@ WriteStream.prototype.open = function() {
 
     this.fd = fd;
     this.emit('open', fd);
-    this.emit('ready', fd);
+    this.emit('ready');
   });
 };
 

test/parallel/test-fs-ready-event-stream.js

@@ -4,4 +4,4 @@ const fs = require('fs');
 
 const file = fs.createReadStream(__filename);
 
-file.on('ready', common.mustCall( () => {}, 1));
+file.on('ready', common.mustCall(() => {}, 1));