Re-evaluate Chakracore - time-travel tool in the tier-list

[RafaelGSS]

As discussed in #533. I'm adding this item to the agenda to evaluate its tier or remove it from the tier-list document.

[tony-go]

• No evidence of usage in the field.
• Seems out of maintenance

We should delete it from the list.

[tony-go]

PR merged, I'll close this issue.