fix transfer ref (#14441)

* fix transfer ref

* delete transfer list search ref

components/transfer/list.tsx

@@ -242,7 +242,6 @@ export default class TransferList extends React.Component<TransferListProps, any
     const checkedAll = checkStatus === 'all';
     const checkAllCheckbox = (
       <Checkbox
-        ref="checkbox"
         disabled={disabled}
         checked={checkedAll}
         indeterminate={checkStatus === 'part'}

components/transfer/search.tsx

@@ -50,7 +50,6 @@ export default class Search extends React.Component<TransferSearchProps, any> {
           placeholder={placeholder}
           className={prefixCls}
           value={value}
-          ref="input"
           onChange={this.handleChange}
           disabled={disabled}
         />