tidy: fix W0221 arguments-differ

[reidpr]

Split from #1860. Pylint: W0221 arguments-differ

For example, superclass:

charliecloud/lib/build.py

Line 293 in d679373

class Instruction(abc.ABC):

charliecloud/lib/build.py

Line 439 in d679373

def checkout_for_build(self, base_image=None):

Subclass:

charliecloud/lib/build.py

Line 616 in d679373

class Instruction_No_Image(Instruction):

charliecloud/lib/build.py

Lines 634 to 635 in d679373

	def checkout_for_build(self):
	pass

This violates Liskov substitution principle and should be fixed.