Remove 'Mosaic' project from manifest.js (#230)

Removed the 'Mosaic' project entry from the manifest.

Author: Rexaintreal

manifest.js

@@ -116,18 +116,6 @@ export default [
         url: 'https://carnival.hackclub.com/',
         fancy: true,
       },
-      {
-        name: "Mosaic",
-        description: "Build a website every month with a different theme. Get stuff. Repeat.",
-        img: "/cards/mosaic.png",
-        background: "#60AFFF",
-        backgroundSize: "25px 25px, 25px 25px, 100%",
-        titleColor: "#000000",
-        descriptionColor: "#000000",
-        external: true,
-        url: 'https://mosaic.hackclub.com/',
-        fancy: true,
-      },
       {
         name: "Blueprint",
         description: "Up to $400 for hardware project grants",