Remove column customer grid with observer

Question

I'm trying to remove some columns from customer grid, but is not working, I've tried several similar events, but none of them work.

my config.xml

<adminhtml>
    <events>
        <core_block_abstract_to_html_before>
            <observers>
                <manage_adminhtml>
                    <class>manage_adminhtml/observer</class>
                    <method>getCustomerGrid</method>
                </manage_adminhtml>
            </observers>
        </core_block_abstract_to_html_before>
    </events>
</adminhtml>

and my observer

class Manage_Adminhtml_Model_Observer
{
    public function getCustomerGrid( $observer )
    {
        $block = $observer->getEvent()->getBlock();

        if ($block->getId() == 'customerGrid') {

            $block->removeColumn('group');
            $block->removeColumn('email');

            $block->sortColumnsByOrder();
        }
    }
}

Answer 1

What you want to do can be achieved with GridControl.

We use the event adminhtml_block_html_before and then call $params->getBlock()->removeColumn($params->getColumn()->getName());