Hide training, as we're not offering training on the new interface

docs/ensembl-help/toc.yml

@@ -8,5 +8,5 @@
 # - name: Annotation and Prediction
 # - href: annotation/toc.yml
 # - url: /help/annotation/
-- name: Training
-  url: https://training.ensembl.org
+#- name: Training
+#  url: https://training.ensembl.org