Remove before/after each TestSuite/Case

[benjaminr-ps]

...as it is not functional

and not documented https://nightwatchjs.org/guide/concepts/test-globals.html

Please fill in this template.

• Use a meaningful title for the pull request. Include the name of the package modified.
• Test the change in your own code. (Compile and run.)
• Add or edit tests to reflect the change.
• Follow the advice from the readme.
• Avoid common mistakes.
• Run npm test <package to test>.

Select one of these and delete the others:

If adding a new definition:

• The package does not already provide its own types, or cannot have its .d.ts files generated via --declaration
• If this is for an npm package, match the name. If not, do not conflict with the name of an npm package.
• Create it with dts-gen --dt, not by basing it on an existing project.
• Represents shape of module/library correctly
• tslint.json should contain { "extends": "@definitelytyped/dtslint/dt.json" }, and no additional rules.
• tsconfig.json should have noImplicitAny, noImplicitThis, strictNullChecks, and strictFunctionTypes set to true.

If changing an existing definition:

• Provide a URL to documentation or source code which provides context for the suggested changes: Test globals
• If this PR brings the type definitions up to date with a new version of the JS library, update the version number in the header.

If removing a declaration:

• If a package was never on Definitely Typed, you don't need to do anything. (If you wrote a package and provided types, you don't need to register it with us.)
• Delete the package's directory.
• Add it to notNeededPackages.json.

[DangerBotOSS]

Inspecting the JavaScript source for this package found some properties that are not in the .d.ts files.
The check for missing properties isn't always right, so take this list as advice, not a requirement.

nightwatch (unpkg)

was missing the following properties:

1. createClient
2. client
3. cli
4. runTests
5. CliRunner

as well as these 2 other properties...

initClient, runner

Generated by 🚫 dangerJS against ec93e5b