Remove viewBox property from .svg-icon CSS

Author: ashawley

_sass/minima/_base.scss

@@ -200,7 +200,6 @@ pre {
     width: 16px;
     height: 16px;
     display: inline-block;
-    viewBox: "0 0 16 16";
     fill: #{$grey-color};
     padding-right: 5px;
     vertical-align: text-top;