I made a custom option to hide my inbox unread counts.
Go to your minimalist dashboard
Hit "Edit" under GMail
Add option
In the CSS box, paste the following (which will remove the unread count to the right of the word "Inbox" in the sidebar):
.J-Ke[href$='#inbox'] {
visibility: hidden;
}
.J-Ke[href$='#inbox']:before {
content: 'Inbox';
visibility: visible;
font-weight:bold;
}
In the "Head JS" box, paste the following (this will remove the unread count from the title of the tab. This isn't the prettiest code - as it renames the title of the tab to "Google.com Mail" every 3 seconds [3000 milliseconds] - but it works):
setInterval(function(){window.top.document.title="Google.com Mail"},3000);
Hope this helps!