eslint-plugin-react-hooks version: 4.2.0

## Steps To Reproduce

I know it shouldn't exist in production code, but it's annoying while editing some files.

```js
import React, { useEffect } from "react";

const App = () => {
  useEffect(); // <-
  return null;
};

export default App;
```

Link to code example: https://codesandbox.io/s/polished-sun-3wr27?file=/src/App.js

## The current behavior

ESLint crashed.

```
TypeError: Cannot read property 'type' of undefined
```

## The expected behavior

ESLint doesn't crash but reports an error instead.
if (enableDangerousAutofixThisMayCauseInfiniteLoops) {
        
        
        if (Array.isArray(problem.suggest) && problem.suggest.length > 0) {
          problem.fix = problem.suggest[0].fix;
        }
      }
      context.report(problem);
    }
    const scopeManager = context.getSourceCode().scopeManager;
    
    const setStateCallSites = new WeakMap();
    const stateVariables = new WeakSet();
    const stableKnownValueCache = new WeakMap();
    const functionWithoutCapturedValueCache = new WeakMap();
    function memoizeWithWeakMap(fn, map) {