Draft: Remove time dimension

Removed the time axis from all data.

Not sure if we should really do this.

Pro time axis

• Data can have a time axis, in addition to the max of 3 dimensions
• Time axis as now has no fixed size; time axis values as part of grid spec would need to be known in advance

Contra time axis

• May need to strip time in adapters or components if source time != pull time
• Noods a workaround for unknown/static time