减少不必要的代码

Former-commit-id: 8c704c1c9e29c1f8887eb3b899977b35b8a5e4bd

src/layout/header-aside/components/header-theme/index.vue

@@ -0,0 +1,26 @@
+<template>
+  <div>
+    <el-tooltip effect="dark" content="主题" placement="bottom">
+      <el-button class="d2-ml-0 d2-mr btn-text can-hover" type="text" @click="dialogVisible = true">
+        <d2-icon name="diamond" style="font-size: 16px"/>
+      </el-button>
+    </el-tooltip>
+    <el-dialog title="主题" width="600px" :visible.sync="dialogVisible">
+      <d2-theme-list style="margin-top: -25px;"/>
+    </el-dialog>
+  </div>
+</template>
+
+<script>
+import themeList from './components/d2-theme-list'
+export default {
+  components: {
+    'd2-theme-list': themeList
+  },
+  data () {
+    return {
+      dialogVisible: false
+    }
+  }
+}
+</script>