Remove stylelint order plugin

[bjankord]

This change resolves #214 and resolves #231
You can now decide if you want to lint the order of your SCSS and what order you'd want your SCSS to be in by installing the stylelint-order plugin and configuring it in your application.

The following rules have been removed with this change:

"order/order": [
      [
        "custom-properties",
        "dollar-variables",
        {
          "type": "at-rule",
          "name": "extend"
        },
        {
          "type": "at-rule",
          "name": "include",
          "hasBlock": false
        },
        "declarations",
        {
          "type": "at-rule",
          "name": "include",
          "hasBlock": true
        },
        "rules"
      ]
],
"order/properties-alphabetical-order": true,