我有四个输入框，但是我不想让她校验第一个，我该如何写校验，vue3 elementplus

<template>
  <div>
    <el-input v-model="input1" />
    <el-input v-model="input2" :rules="input2Rules" />
    <el-input v-model="input3" :rules="input3Rules" />
    <el-input v-model="input4" :rules="input4Rules" />
  </div>
</template>

<script>
import { ref } from 'vue';

export default {
  setup() {
    const input1 = ref('');
    const input2 = ref('');
    const input3 = ref('');
    const input4 = ref('');

    // 校验规则
    const input2Rules = [
      { required: true, message: '请输入内容' },
    ];

    const input3Rules = [
      { required: true, message: '请输入内容' },
    ];

    const input4Rules = [
      { required: true, message: '请输入内容' },
    ];

    return {
      input1,
      input2,
      input3,
      input4,
      input2Rules,
      input3Rules,
      input4Rules,
    };
  },
};
</script>