import re


def remove_useless_lines(text):
	"""Removes lines that don't contain a word nor a number.

	Args:
		text (string): markdown text that is going to be processed.

	Returns:
		string: text once it is processed.
	"""
	# Useless lines
	useless_line_regex = re.compile(r'^[^\w\n]*$', re.MULTILINE | re.UNICODE)
	processed_text = useless_line_regex.sub(r'', text)   
	return processed_text