Remove postcss-color-mod, no longer required

Author: LukeTowers

package.json

@@ -10,7 +10,6 @@
     },
     "devDependencies": {
         "postcss": "~8.4.x",
-        "postcss-color-mod-function": "~3.0.x",
         "postcss-import": "~14.1.x",
         "tailwindcss": "~3.0.x",
         "vue-loader": "~17.0.x"

winter.mix.js

@@ -1,16 +1,11 @@
 let mix = require('laravel-mix');
 mix.setPublicPath(__dirname);
 
-const postcssColorMod = require('postcss-color-mod-function');
-
 mix.postCss('assets/css/src/app.css', 'assets/css/dist/backend.css', [
     require('postcss-import'),
     require('tailwindcss/nesting'),
     require('tailwindcss'),
     require('autoprefixer'),
-    postcssColorMod({
-        unresolved: 'ignore',
-    }),
 ]);
 
 mix.js('assets/js/src/app.js', 'assets/js/dist/app.js').vue({ version: 3 });