feat(css): Update style components

Signed-off-by: Valentin Popov <info@valentineus.link>

_scss/utilities/_boxsizing.scss

@@ -1,15 +0,0 @@
-// Box Sizing
-//
-// The box-sizing property in CSS controls how the box model
-// is handled for the element it applies to.
-//
-// Values: content-box | border-box
-// Default: content-box
-//
-// https://www.w3.org/TR/css-ui-3/#box-sizing
-@mixin box-sizing($value: content-box) {
-  -webkit-box-sizing: $value;
-     -moz-box-sizing: $value;
-      -ms-box-sizing: $value;
-          box-sizing: $value;
-}