Step 1. Open template file: pdf/invoice.addresses-tab.tpl
Step 2. Remove shop address and change width for both delivery and invoice address to 50%
<table id="addresses-tab" cellspacing="0" cellpadding="0"> <tr> <td width="50%"> {if $delivery_address}<span class="bold">{l s='Delivery Address' pdf='true'}</span><br/><br/> {$delivery_address} {/if} </td> <td width="50%"><span class="bold">{l s='Billing Address' pdf='true'}</span><br/><br/> {$invoice_address} </td> </tr> </table>
Step 3. Save template file to your themes folder eg. themes/<your theme>/pdf/invoice.addresses-tab.tpl
Here is a screenshot what the invoice header looks like after the shop address is removed.