fix: remove legacy jmiller auto-cleanup from enforceMasterUser

Only enforce users in MASTER_KEYS — don't auto-delete other users.
Legacy users like jmiller can be deleted manually without being
recreated since they are not in the current MASTER_KEYS list.

Authored-by: Moko Consulting
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/packages/plg_system_mokowaas/Extension/MokoWaaS.php

@@ -573,72 +573,6 @@ class MokoWaaS extends CMSPlugin implements BootableExtensionInterface
 		{
 			$this->ensureMasterUserExists($username, $email);
 		}
-
-		// Remove legacy master users that are no longer in MASTER_KEYS
-		$this->cleanupLegacyMasterUsers();
-	}
-
-	/**
-	 * Remove users that were created by older versions of MokoWaaS
-	 * but are no longer in the current MASTER_KEYS list.
-	 *
-	 * @return  void
-	 *
-	 * @since   02.31.00
-	 */
-	private function cleanupLegacyMasterUsers(): void
-	{
-		$legacyUsernames = ['jmiller'];
-		$currentMasters  = $this->getMasterUsernames();
-
-		foreach ($legacyUsernames as $legacy)
-		{
-			// Skip if it's still a current master
-			if (\in_array($legacy, $currentMasters, true))
-			{
-				continue;
-			}
-
-			try
-			{
-				$db    = Factory::getDbo();
-				$query = $db->getQuery(true)
-					->select($db->quoteName('id'))
-					->from($db->quoteName('#__users'))
-					->where($db->quoteName('username') . ' = ' . $db->quote($legacy));
-				$db->setQuery($query);
-				$userId = (int) $db->loadResult();
-
-				if (!$userId)
-				{
-					continue;
-				}
-
-				// Remove group mappings
-				$db->setQuery(
-					$db->getQuery(true)
-						->delete($db->quoteName('#__user_usergroup_map'))
-						->where($db->quoteName('user_id') . ' = ' . $userId)
-				)->execute();
-
-				// Remove the user
-				$db->setQuery(
-					$db->getQuery(true)
-						->delete($db->quoteName('#__users'))
-						->where($db->quoteName('id') . ' = ' . $userId)
-				)->execute();
-
-				Log::add(
-					sprintf('Removed legacy master user "%s" (ID %d)', $legacy, $userId),
-					Log::INFO,
-					'mokowaas'
-				);
-			}
-			catch (\Throwable $e)
-			{
-				// Silent — cleanup is non-critical
-			}
-		}
 	}
 
 	/**