chore(php8): remove PHP ini values dropped in PHP 7.0 #0000

[Ayesh]

Drops PHP INI values that are dropped in PHP 7.0.

This is merely a chore because these INI values are not effective in any of the current images.

Checklist

• Breaking change: fix or feature that would cause existing functionality to not work as expected
• I have read the Contributing doc
• I have read the Creating and reviewing pull requests at LinkORB guide doc
• Lint and unit tests pass locally with my changes
• I have added/updated necessary documentation in the README.md or doc/ directories (if appropriate)