fix: remove outline from unstyled-button

See #103

Author: satazor

www/shared/styles/imports/mixins/unstyled-button.css

@@ -1,7 +1,6 @@
 @define-mixin unstyled-button {
     padding: 0;
     border: none;
-    outline-style: none;
     background: transparent;
     border-radius: 0;
     color: inherit;