Remove old outline property from default config

Co-Authored-By: Adam Wathan <[email protected]>

Author: reinink

stubs/defaultConfig.stub.js

@@ -697,11 +697,6 @@ module.exports = {
       11: '11',
       12: '12',
     },
-    outline: {
-      none: ['2px solid transparent', '2px'],
-      white: ['2px dotted white', '2px'],
-      black: ['2px dotted black', '2px'],
-    },
     padding: ({ theme }) => theme('spacing'),
     placeholderColor: ({ theme }) => theme('colors'),
     placeholderOpacity: ({ theme }) => theme('opacity'),