Here are the list of files to modify to remove sku from virtuemart, order, invoices and emails:
com_virtuemart/cart/default_pricelist.php
com_virtuemart/invoice/invoice_items.php
com_virtuemart/invoice/mail_html_pricelist.php
com_virtuemart/invoice/mail_raw_pricelist.php
com_virtuemart/orders/details_items.php
When modifying tables, change the product name column to colspan=”3″ where you find colspan=”2″
Make sure to create overrides in your template
If your template already have overrides for those then save your files before updating the template as they would be overriden.
Ideally make a copy of your template to not accidently erase your modification when updating your template.