To clear/delete the dummy testimonials for Layout 1 follow the process mentioned below.

 Step 1: Login to Zepo Dashboard 

Step 2: Go to Content > Site Elements. 

Step 3: Click on Testimonials Box under the heading 3rd Party Widgets. 

Step 4: Delete (You can update testimonials with yours) all the content in the boxes. 

Step 5: Scroll to bottom of the page and click update to save the settings.