Want to remove a theme?
You can easily remove any theme you have installed. So, if ya basic:
Open your Google Chrome web browser.
At the top right, [three dot bar] - click it.
Look for "Settings" in the pop-up menu & click on it. (This opens "chrome://settings/" in a new tab.)
Scroll the page - Look for "Appearance" - click on the "Reset to default" button.
Viola! You should now see the default Google Chrome theme again. Which is cool, but you're not Google.