Chart.Ticks.generators.time is broken in master

[benmccann]

Chart.Ticks.generators.time calls generate passing in opts.stepSize as the fifth parameter instead of capacity. I'm not sure how to determine capacity given that this is a static method without access to any chart properties like me.min that would be needed to determine the capacity.

[simonbrunel]

As we agree with @etimberg, we are going to make Chart.Ticks private, so we will be able to remove Chart.Ticks.generators.time.