remove_menu_page breaks form edit interface

I've found that adding this to the admin_init hook will break the Gravity Forms edit form interface:

function my_func_clear_admin() {
remove_menu_page('edit-comments.php');
remove_menu_page('link-manager.php');
}

regardless of the function name, having any kind of remove_menu_page function call will cause the edit form screen to throw a javascript error:

Uncaught SyntaxError: Unexpected identifier in tw-sack.js line 1

Are there any solutions to this?

I can duplicate this issue as I just ran into it myself with v1.6.10.1. Form editing works fine in Twenty Twelve and with/without all plugins active, so I switched back to my custom theme and started deleting functions until I found the culprit, and it looks like remove_menu_page() is the one that did it. I'm hiding Posts and Comments for this client since they aren't using them, but I think I'm going to have to leave them in now since it's not allowing form editing.

Any idea what might be causing this?

Thanks,
Matt

Completely custom theme on WordPress 3.5, all JS is loaded with !is_admin() in the enqueue, so it's only loading on the front end. I tried taking out all theme JS and CSS, but it was still preventing me from editing the form. The only thing that fixed it was taking away the call to remove_menu_page(). Here's the call I'm using in functions.php:

// Hide Admin Areas that are not used
add_action( 'admin_init', 'my_remove_menu_pages' );
function my_remove_menu_pages() {
	remove_menu_page('edit.php');
	remove_menu_page('edit-comments.php');
}

This was the only thing in the theme that made it stop working, so I turned it off for now, but need to get it turned back on if possible.

David - sure I can send the theme. It's still in development and I'm doing it locally on my Mac for a client, so if I can get it to you privately since it's client work, that would be great.

It's based on my starter theme that I have on Github - https://github.com/mattbanks/WordPress-Starter-Theme

I did a but more digging and found out the recommended hook has changed for removing menu pages. I had it hooked to admin_init, which was running entirely too soon. Changed it to hook into admin_menu and it now form editing is not broken!

Here's the proper revised code that works, in case others see this and wonder what's needed:

// Hide Admin Areas that are not used
add_action( 'admin_menu', 'my_remove_menu_pages' );
function my_remove_menu_pages() {
	remove_menu_page('edit.php');
	remove_menu_page('edit-comments.php');
}