Fix breadcrumb em rounding

src/themes/default/collections/breadcrumb.variables

@@ -10,7 +10,7 @@
 @display: inline-block;
 @verticalAlign: middle;
 
-@dividerSpacing: 0.5rem;
+@dividerSpacing: 0.21428rem;
 @dividerOpacity: 0.7;
 @dividerColor: @lightTextColor;
 
@@ -30,14 +30,4 @@
        States
 --------------------*/
 
-@activeFontWeight: bold;
-
-/* Sizes */
-@mini: 0.65em;
-@tiny: 0.7em;
-@small: 0.75em;
-@medium: 1em;
-@big: 1.05em;
-@large: 1.1em;
-@huge: 1.3em;
-@massive: 1.5em;
+@activeFontWeight: bold;