Re-order and Fix axis properties
Re-order and Fix axis properties

- Remove outdated comments - we no longer these comments as now `getSpecifiedOrDefaultValue()` make this pretty clear
- Remove one of the `tickSize`, which appears twice.

cc: da39a3ee5e6b4b0d3255bfef95601890afd80709@yuhanlu

uwdata/vega-lite,vega/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite