Magento: How To Remove The "Position" Sort Option

Step 1 : Edit toolbar.phtml inside the folder
        app/design/frontend/yourpackage/yourtheme/template/catalog/product/list/toolbar.phtml


 Step 2 : And Find this code if you open this file in notepad++ go to line No.91.

 <?php foreach($this->getAvailableOrders() as $_key=>$_order): ?>
   <option value="<?php echo $this->getOrderUrl($_key, 'asc') ?>"<?php if($this->isOrderCurrent($_key)): ?> selected="selected"<?php endif; ?>>
        <?php echo $this->__($_order) ?>
   </option>
  <?php endforeach; ?>

Then Replacing this code

<?php foreach($this->getAvailableOrders() as $_key=>$_order): ?>
    <?php if ($_order != 'Position') : // Remove "Position" from the sort option list ?>
        <option value="<?php echo $this->getOrderUrl($_key, 'asc') ?>"<?php if($this->isOrderCurrent($_key)): ?> selected="selected"<?php endif; ?>>
            <?php echo $_order ?>
        </option>
    <?php endif; // End for removing "Position" sort option ?>
<?php endforeach; ?> 

Step 3 : Done!