remove color customization

Author: taylorotwell

src/Presets/bootstrap-stubs/_variables.scss

@@ -5,15 +5,3 @@ $body-bg: #f8fafc;
 $font-family-sans-serif: 'Nunito', sans-serif;
 $font-size-base: 0.9rem;
 $line-height-base: 1.6;
-
-// Colors
-$blue: #3490dc;
-$indigo: #6574cd;
-$purple: #9561e2;
-$pink: #f66d9b;
-$red: #e3342f;
-$orange: #f6993f;
-$yellow: #ffed4a;
-$green: #38c172;
-$teal: #4dc0b5;
-$cyan: #6cb2eb;