Delete copy of fb-specific test that lives in hphp/test/slow
Summary:
D18311216 (https://github.com/facebook/hhvm/commit/
67d9cef36cb54f8468abc767f80af629f8e68673) copied hphp/facebook/test/ext/ext_photodna_dedupe.php to hphp/test/slow/hack_arr_compat/ext_photodna_dedupe.php so that it could be tested with different runtime options (related to hack array migration). HAM is complete, so this duplication is no longer needed, and this test depends on the ext_photodna extension that is not available in OSS. Delete the copy in hphp/test/slow.
Reviewed By: oulgen
Differential Revision:
D39591757
fbshipit-source-id:
473b59a2e9ce76a9cbab771d151c7ba5ddba24c5