Removed CSS rule for maintenance warning due to upstream changes.

CHANGES.md

@@ -4,6 +4,10 @@ moodle-theme_boost_campus
 Changes
 -------
 
+### Unreleased
+
+* 2019-10-28 - Removed CSS rule for maintenance warning due to upstream changes.
+
 ### Release v3.7-r2
 
 * 2019-06-21 - Removed SCSS fix because MDL-61319 has now been fixed and integrated.

scss/post.scss

@@ -864,7 +864,6 @@ a[href^="mailto"]::before {
   -------------------------------------*/
 /* Improve the maintenance warning to be full width and to be displayed above the navdrawer navigation. */
 .maintenancewarning {
-    z-index: $zindex-dropdown;
     width: 100%;
     text-align: center;
     margin: 0 !important;