Remove deploy scripts dependency on distributions submodule in web-php

[theodorejb]

Tools like GitHub Desktop and SourceTree automatically initialize/sync submodules when switching branches or pulling updates, and because the distributions submodule (pointing to https://github.com/php/web-php-distributions) is dozens of gigabytes in size this can result in unexpected huge consumption of bandwidth and storage for contributors to web-php.

Per @derickr it should be possible to change the deploy scripts to not rely on this submodule.