Revert r69841, r69882, r69892, r69896, r69910 in phase3/maintenance/language because...

Revert r69841, r69882, r69892, r69896, r69910 in phase3/maintenance/language because rebuildLanguage.php was broken.

This prevented message updates by Raymond from translatewiki.net.

Reported issues:
* Warning: in_array() expects parameter 2 to be array, null given in maintenance\language\languages.inc on line 173
* Warning: in_array() expects parameter 2 to be array, null given in maintenance\language\languages.inc on line 175
* Warning: in_array(): Wrong datatype for second argument in phase3\maintenance\language\languages.inc on line 175