build fixes

src/scss/_variables.scss

@@ -330,6 +330,7 @@ $badge-line-height: $code-line-height !default;
 $badge-font-weight: $font-weight-medium !default;
 $badge-padding-y: .25em !default;
 $badge-padding-x: .5em !default;
+$badge-empty-size: .5rem !default;
 
 //buttons
 $input-btn-line-height: $line-height-base !default;

src/scss/utils/_colors.scss

@@ -1,19 +1,5 @@
 // stylelint-disable declaration-no-important
 
-@each $color, $value in $theme-colors {
-  .bg-#{"" + $color}-lt {
-    color: $value !important;
-    background: theme-color-lighter($value, true) !important;
-  }
-}
-
-// Extra colors
-@if $enable-extra-colors {
-  @each $color, $value in $extra-colors {
-    .bg-#{"" + $color} {
-      background-color: $value !important;
-    }
-
 // All colors
 @each $color, $value in theme-colors() {
   .bg-#{"" + $color} {