Clean up Field.__init__(..., kwargs)

[VeckoTheGecko]

Some of the kwargs in the Field initialiser (e.g., dataFiles) aren't used in the codebase, or they're used for tasks that will be implemented via other means in the v4 codebase.

[VeckoTheGecko]

or they're used for tasks that will be implemented via other means in the v4 codebase.

An example is the checking for duplicated Grids. This will be handled via a different, more durable mechanism in v4

Parcels/parcels/fieldset.py

Lines 438 to 462 in aba423c

	# check if grid has already been processed (i.e. if other fields have same filenames, dimensions and indices)
	for procvar, _ in fields.items():
	procdims = dimensions[procvar] if procvar in dimensions else dimensions
	procinds = indices[procvar] if (indices and procvar in indices) else indices
	procpaths = filenames[procvar] if isinstance(filenames, dict) and procvar in filenames else filenames
	nowpaths = filenames[var] if isinstance(filenames, dict) and var in filenames else filenames
	if procdims == dims and procinds == inds:
	possibly_samegrid = True
	if not possibly_samegrid:
	break
	if "depth" in dims and dims["depth"] == "not_yet_set":
	break
	processedGrid = False
	if (not isinstance(filenames, dict)) or filenames[procvar] == filenames[var]:
	processedGrid = True
	elif isinstance(filenames[procvar], dict):
	processedGrid = True
	for dim in ["lon", "lat", "depth"]:
	if dim in dimensions:
	processedGrid *= filenames[procvar][dim] == filenames[var][dim]
	if processedGrid:
	grid = fields[procvar].grid
	if procpaths == nowpaths:
	dFiles = fields[procvar]._dataFiles
	break