Black Bar Removal has been replaced by Ink for Google
Ink for Google improves the look of well-known Google websites like Search, Gmail and Calendar. It unifies them under the guidelines defined by the Material Design team at Google. Ink for Google takes inspiration from the visual style of Google's Android apps and their newest websites to create a better and consistent experience across all of these services.
Download Ink for GoogleTo remove the extension, enter chrome://extensions in the address bar,
locate "Black Bar Removal", and click on the remove icon.