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.
getWarningMessage(
              unnecessaryDependencies,
              'an',
              'unnecessary',
              'exclude',
            ) ||
            getWarningMessage(
              duplicateDependencies,
              'a',
              'duplicate',
              'omit',
            )) +
          extraWarning,
        suggest: [
          {
            desc: `Update the dependencies array to be: [${suggestedDeps
              .map(formatDependency)
              .join(', ')}]`,
            fix(fixer) {
              
              return fixer.replaceText(
                declaredDependenciesNode,
                `[${suggestedDeps.map(formatDependency).join(', ')}]`,
              );
            },
          },
        ],
      });
    }
    function visitCallExpression(node) {