remove reference to strict option

[hertzsprung]

Description

Removed 'Skip undefined tests' section

Motivation & context

Strict option was removed in cucumber 7, see cucumber/cucumber-jvm#2275

Type of change

Doc fix.

Checklist:

• I have read the CONTRIBUTING document.
• My change needed additional tests
  • I have added tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

[quine-bot]

👋 Figuring out if a PR is useful is hard, hopefully this will help.

• @hertzsprung has been on GitHub since 2009 and in that time has had 50 public PRs merged
• Don't you recognize them? They've been here before 🎉
• Here's a good example of their work: hamcrest-json (Hamcrest matchers for comparing JSON documents)
• From looking at their profile, they seem to be good with Java and HTML.

Their most recently public accepted PR is: hertzsprung#1

[luke-hill]

Forgot we didn't remove this.

I also have no idea what that bot is.... @aslakhellesoy / @mlvandijk any ideas?