The `throw` statements that were recently inserted into these tests have
an observable impact on the parsing behavior: they causes the `"use
strict"` token sequence to be interpreted as a string literal instead of
a directive prolog, which in turn effects how the tests are interpreted.

Remove the new `throw` statements from these tests and rely on
previously-existing statements that serve the same purpose without
impacting program strictness.

This script is intended to identify common test file formatting errors
prior to their acceptance into the project. It is designed to support
future extensions for additional validation rules.