[Validator] Removed bogus test which fails on some systems

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

This test fails on my system because PHPUnit is not converting the strict standards error to an exception (for some reason). I investigated this for a short while before recognizing that the test is worthless. It is testing that PHP throws a strict standard error when a file with invalid code is loaded. Therefore we can safely remove this test.