update doc

Author: ota-meshi

docs/user-guide/index.md

@@ -479,40 +479,6 @@ You need to use [vue-eslint-parser] v9.0.0 or later.
 
 Previously you had to use the `vue/setup-compiler-macros` environment, this is no longer needed.
 
-#### Parsing error with Top Level `await`
-
-##### Using ESLint <= v7.x
-
-The parser `espree` that comes with `ESLint` v7.x doesn't understand the syntax of ES2022, so it can't parse the Top Level `await` either.  
-However, `espree` >= v8 can understand the syntax of ES2022 and parse the Top Level `await`.  
-You install `espree` >= v8 and specify `"espree"` and ES2022 in your configuration, the parser will be able to parse it.
-
-```js
-module.exports = {
-  parser: 'vue-eslint-parser',
-  parserOptions: {
-    parser: 'espree', // <-
-    ecmaVersion: 2022, // <-
-    sourceType: 'module'
-  },
-}
-```
-
-However, note that the AST generated by `espree` v8+ may not work well with some rules of `ESLint` v7.x.
-
-##### Using ESLint >= v8.x
-
-You need to specify `2022` or `"latest"` for `parserOptions.ecmaVersion`.
-
-```js
-module.exports = {
-  parserOptions: {
-    ecmaVersion: 'latest',
-    sourceType: 'module'
-  },
-}
-```
-
 #### Other Problems
 
 Try searching for existing issues.