Remove explanations from the 7 point slider after training

[cise-midoglu]

Currently, the rating scheme is explained to participants at each question with the following image:

(version at 37a8cfe)

We have received feedback from preliminary testers that this might be distracting, after the training stage. Once they see the explanations in blue during training, these can be removed for the actual questions.

[davidlindero]

Sent this updated .png to @rakeshraor , hopefully it can easily be added to the repo and updated.