Remove training environment as it is scheduled to be shutdown.

docs/services/utbs.md

@@ -29,9 +29,6 @@ The UTBS is currently deployed to the following environments:
 |             |                                      | utbs-live-db.srv.uis.private.cam.ac.uk |
 | Staging     | [https://uis-tm-test.training.cam.ac.uk/](https://uis-tm-test.training.cam.ac.uk/)      | utbs-test1.srv.uis.private.cam.ac.uk |
 |             |                                      | utbs-test2.srv.uis.private.cam.ac.uk |
-|             |                                      | utbs-test-nodeq.csi.private.cam.ac.uk |
-| Training    | [https://uis-tm-train.training.cam.ac.uk](https://uis-tm-train.cam.ac.uk)  | utbs-train1.srv.uis.private.cam.ac.uk |
-|             |                                      | utbs-train2.srv.uis.private.cam.ac.uk |
 
 The training environment is used to train users of the system.