Patrick, a Shopify Guru here :).
I'm not sure how to remove it from the code but you should be able to remove it from your Language settings. If you go to Online store
* Then click on the button that looks like 3 dots
* From the drop down select "Edit Langauge"
Then you should be able to Sorry, there are no products in this collection and delete it. :)
Hope that helps :)
This worked for me with the Boundless theme.
However, for the current (2020) UI within Shopify:
Online Store > Actions (dropdrown button) > Edit Languages
Once on this page click on Collections and under the General heading you will find "No matches" with the "sorry" text you want to remove. Erase that and click save. There will be an alert saying it's incomplete, but it will still save and the text will be removed from your pages.