Revert "List OOjs UI documentation"

Added a broken link (404). OOjs UI job is not ready yet, I only merged the oojs core one because of pending issues I discovered.

This reverts commit 8db0f41e7c023bbb5bca01a9e2072f82e7ef068a.

Change-Id: I2e4fe7ce47a640a89f6f2c78bf667ed88b899787