Remove options defaultProps value from EuiSuperSelect

[thompsongl]

Summary

Fixes #1911, in which the options prop in EuiSuperSelect was not showing as required in the docs Props table. The gist of the problem is that react-docgen resolves all props that have a defaultProps value as not required. Regardless of opinion/correctness there, we should rely on either isRequired or defaultProps in our component definitions.
The fix here is to remove the options defaultProps value.

Checklist

- [ ] This was checked in mobile
- [ ] This was checked in IE11
- [ ] This was checked in dark mode

• Any props added have proper autodocs

- [ ] Documentation examples were added

• A changelog entry exists and is marked appropriately
• This was checked for breaking changes and labeled appropriately
• Jest tests were updated or added to match the most common scenarios

- [ ] This was checked against keyboard-only and screenreader scenarios
- [ ] This required updates to Framer X components

[chandlerprall]

Agreed with your description and removing the default value (why have a select box with no options?)! I think there's a second issue at play here when the provided value is not in the list of options (whether that's the default empty list, or is caused by some other mis-match). The mentioned error occurs when trying to access the inputDisplay of an option that doesn't exist -

eui/src/components/form/super_select/super_select_control.js

Lines 42 to 45 in 75fee43

	if (value) {
	const selectedOption = options.find(option => option.value === value);
	selectedValue = selectedOption.inputDisplay;
	}

  if (value) {
    const selectedOption = options.find(option => option.value === value);
    selectedValue = selectedOption.inputDisplay;
  }

and EuiSuperSelectControl should null-check selectedOption

[chandlerprall]

Changes LGTM; component no longer breaks locally with bad data

[chandlerprall]

Needs a changelog