test: remove duplicate checks in pummel/test-timers

Remove checks in pummel/test-timers that are already checked in
parallel/test-timers-clear-null-does-not-throw-error.

PR-URL: #34473
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/pummel/test-timers.js

@@ -23,14 +23,10 @@
 const common = require('../common');
 const assert = require('assert');
 
-const WINDOW = 200; // Why is does this need to be so big?
+const WINDOW = 200; // Why does this need to be so big?
 
 let interval_count = 0;
 
-// Check that these don't blow up.
-clearTimeout(null);
-clearInterval(null);
-
 assert.strictEqual(setTimeout instanceof Function, true);
 const starttime = new Date();
 setTimeout(common.mustCall(function() {