layout.scss in sass-zero-1.1.5

- old
+ new

@@ -1,7 +1,6 @@
 @import "../variables/breakpoints";
-@import "../variables/effects";
 
 .debug * {
   outline: 1px #f00 solid !important;
 }
 
@@ -61,10 +60,10 @@
   height: 100%;
 }
 
 .u-disabled {
   pointer-events: none;
-  opacity: $opacity-50;
+  opacity: 0.5;
 }
 
 .u-off-screen {
   position: absolute;
   left: -9999em;