maint(dependencies): Remove now unused dependency on validate.js.

Author: thet

package.json

@@ -46,7 +46,6 @@
         "tippy.js": "^6.3.7",
         "underscore": "^1.13.2",
         "url-polyfill": "^1.1.9",
-        "validate.js": "^0.13.1",
         "whatwg-fetch": "^3.4.0"
     },
     "devDependencies": {