First, log in to Matterport Cloud (my.matterport.com) and find the space you want to unpublish (remove) from Google. The space must be public to remove.
Click on "Apps" from the tabs above the Showcase.
Only Admins and collaborators with Editor access to this space can remove it from Google Street View.
Click the trash can icon.
Confirm that you really want to remove.
If you still see the images after 24 hours, please try following Google's solution to removing images from Google Maps: HERE