Remove 'x' as a response option in emotional memory task

[cho890]

This applies to the encoding part of the task administered in both sets 4 and 10. On the instruction screen, please remove "If you did not see the picture, please press ‘x’”. Please also remove 'x' to be a response option that participants can provide.

[noah10]

This is up on dev and ready to be tested.

[cho890]

This issue has been completed.