Check my code below for one of the columns. Is there any property missing that would hide that row?
$this->addColumn('customer_lastname', array( 'header' => Mage::helper('sales')->__('Last Name'), 'index' => 'customer_lastname', 'sortable' => false, 'filter' => false, ));
I also want to remove "Reset Filter" and "Search" button. So please help me for that also .