Revert "(bug 48937) ValueFormatter for Time DataValue"

This commit broke the build. https://travis-ci.org/wikimedia/mediawiki-extensions-DataValues/builds/9695217

This reverts commit 703dbd2aa1ba9af738e0c97680d48fc2f05cf432.

Change-Id: I6bd0726532eb4ea430af8e21b90acb6216021229
Merge "Revert "(bug 48937) ValueFormatter for Time DataValue""