Create a file in your /hooks files: YOURTABLENAME-dv.js
$j(function() {
$j("form > .page-header").hide()
});
You can use .remove() instead of .hide().
If you want to keep the [Add new]-button, try the following code:
$j(function() {
$j("form > .page-header > h1 > .row > div > a").remove()
});