It’s just the configuration to debug. To hide it, please go to the Configuration >> Advanced >> Developer, at the Current Configuration Scope, set the storeview that currently using. You can see the Profiler at section Debug, set ‘No’ on this.
Please see the link below for more detail.
- Gallery Image Issue
- wcode bug
- Product tabs re-order on homepage
- slideshow css and icons
- Mobile view: Product detail page scroll issue
- Header search bar is not working properly on inner pages
- How to edit the default text on the Promobar
- Hamburger menu and category filter not working on mobile sticky header
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