Remove status/progress hook implementations

We decided to remove these for a few reasons:
* Incomplete override. Using showProgress built-in of IJ1 macros, for
  example, gets the progress bar directly and bypasses these methods.
* Conflation of IJ2 / IJ1 directionality. The hooks are installed at the
  BOTTOM of the IJ1 methods - so the IJ1 status or progress is already
  resolved. Then it goes through the IJ2 StatusService but only in
  non-legacy mode. Thus these hooks are only to support showing IJ1
  status events in IJ2's modern mode, which is not currently a priority.
* Performance. We were always checking the legacy mode flag, which adds
  non-negligible overhead.

Note that the IJ2 > IJ1 status propagation is not affected by these
changes.