remove jenkinsEnableVideo suite parameter from user guide

[vdelendik]

we don't need it anymore: zebrunner/pipeline-ce#134
we are going to enable it by default for our own hub providers. Users might manage this capabilities later on their own using capabilities, overrideFields or custom fields if needed

[vdelendik]

fixed. ticket better to verify before the release right after merging to master. It should update official docs on github.io

[ghost]

Will be tested later.

[dhreben]

Fixed.