button.sass in rbbt-rest-1.4.9

- old
+ new

@@ -1,5 +1,4 @@
-@import 'grid_system'
 @import 'colors'
 
 =rbbt_button($color_text: $color_alt, $color_bg: $color_main)
   display: inline-block
   padding: 0.2em 0.6em