📌QSelectBox 코드 수정

- remove unused code
- modify sample code

src/components/Playground.jsx

@@ -537,7 +537,7 @@ export default function Playground() {
           <Button onClick={handleChangeMyData2}>QSelectBox dynamic data bind change!!</Button>
         </div>
         <div className="my-2">
-          <QSelectBox options={[]} value={{}} sourceKey="id" targetKey="raftBaseCd" showKey="clCodeNm" />
+          <QSelectBox title="초기값 테스트" options={[]} value={{}} sourceKey="id" targetKey="raftBaseCd" showKey="clCodeNm" />
         </div>
         <div className="my-2">
           <SampleReducer />

src/components/common/select/QSelectBox.jsx

@@ -1,7 +1,6 @@
 'use client'
 import { useEffect, useRef, useState } from 'react'
 import { useOnClickOutside } from 'usehooks-ts'
-import { isObjectNotEmpty } from '@/util/common-utils'
 
 /**
  *