Revert "Merge pull request #267 from pi-hole/folderStructure"

This reverts commit fba3d10fa4, reversing
changes made to 4ee75f4167.

scripts/pi-hole/php/func.php

@@ -1,10 +0,0 @@
-<?php
-
-function is_valid_domain_name($domain_name)
-{
-    return (preg_match("/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i", $domain_name) &&  //valid chars check
-        preg_match("/^.{1,253}$/", $domain_name) && //overall length check
-        preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $domain_name)); //length of each label
-}
-
-?>