I597ed2b5666f4214173609f7e77e23dbc4fd81ae
removed the --wiki option for phpunit.php
as part of T90875

mwdd in mwcli was passing --wiki, but now doesn't
need to bother.

This also removes some debug output that was accidently
merged.

The phpunit command might need another iteration in the
future as the wiki decision topic is still open

Change-Id: I97410b1327c91bdb00a3a3b63515de4057b36b55