datepicker 옵션 변경

src/components/common/Layout/DetailGrid.js

@@ -109,6 +109,7 @@ const DetailGrid = ({ items, formData, onChange, disabled = false, columns = 4 }
 				return (
 					<DatePicker
 						{...commonProps}
+						allowClear={false}
 						showTime={showTime || false}
 						value={currentValue ? dayjs(currentValue) : null}
 						format={format || 'YYYY-MM-DD'}