Remove reference to unsused class is-max-desktop (#562)

Author: jarrodmillman

assets/theme-css/bulma.css

@@ -12,12 +12,12 @@
   }
 }
 @media screen and (min-width: 1216px) {
-  .container:not(.is-max-desktop) {
+  .container {
     max-width: 1152px;
   }
 }
 @media screen and (min-width: 1408px) {
-  .container:not(.is-max-desktop):not(.is-max-widescreen) {
+  .container:not(.is-max-widescreen) {
     max-width: 1344px;
   }
 }