把element-ui的多选表格的表头的多选框去除

使用scss的deep:

:deep(.el-table) {
	.has-gutter {
		.el-table__cell:first-child {
			.cell {
				&::before {
		            content: "选择";
		            position: absolute;
		            left: 50%;
		            top: 50%;
		            transform: translate(-50%, -50%);
		          }
			}
		}
	}
}