Remove `pathtools.create_directory()` again

[ehrenfeu]

The function doesn't add any value compared to a simple os.makedirs() call, as nothing is done except checking for existence of the target directory (no logging, no else-clause, ...). The situation when the target exists is gracefully handled by os.makedirs() already.

So actually this only adds complexity to the library and makes the code harder to read for people not familiar with it (requiring them to look up the API docs or similar).

python-imcflibs/src/imcflibs/pathtools.py

Lines 360 to 369 in 1d832b5

	def create_directory(new_path):
	"""create a new directory if it does not already exist
	Parameters
	----------
	new_path : str
	Path to the new directory
	"""
	if not os.path.exists(new_path):
	os.makedirs(new_path)

[ehrenfeu]

Since @lguerard pointed out that this functionality is actually a valid use-case in Python versions older than 3.2, the function has been re-added in 88ee3a8 (cf. #49).