Is the pseudo dimension check required?

[truth-quark]

cubewrite() has this block of code:

um2nc-standalone/umpost/um2netcdf.py

Lines 369 to 373 in c1a4a54

	# Check whether any of the coordinates is a pseudo-dimension with integer values and
	# if so, reset to int32 to prevent problems with possible later conversion to netCDF3
	for coord in cube.coords():
	if coord.points.dtype == np.int64:
	coord.points = coord.points.astype(np.int32)

Earlier project discussions mentioned dropping netCDF3 support.

Open questions:

• Is this code block required for any non netCDF3 support?
• Are there other requirements to down convert coord points from 64 to 32 bit integers?
• Can the code block be deleted?