Remove Global CSS Import

Nextjs does not allow Global CSS Import, hence this one line causes it not to work on Next. Can be added by the user themselves.

Author: SaadBazaz

packages/slate-table/src/controls/ControlledRangeDisableAcross.tsx

@@ -1,6 +1,5 @@
 import React, { useState, useCallback } from 'react';
 import Slider, { Range } from 'rc-slider';
-import 'rc-slider/assets/index.css';
 
 const ControlledRangeDisableAcross = ({ initialValue = [], onChange }) => {
   const [value, setValue] = useState(initialValue);