Update _index.scss

Author: extrabright

scss/core/_index.scss

@@ -6,7 +6,6 @@
 @import "maps";
 
 // Bootstrap functions, bariables, and mixins
-@import "bootstrap/scss/functions";
 @import "bootstrap/scss/maps";
 @import "bootstrap/scss/variables";
 @import "bootstrap/scss/mixins";