Remove unused pylint suppressions

pylint is not used since bb5b1a0. The pyflakes cleanup mentioned in that
commit has not been done, but given that this project is no longer being
actively developed I don't think it's worth spending time doing it.

Leaving the pylint suppressions causes confusion because it leads people
to think that we are still using pylint.

Change-Id: If7d9f280a0f408c780f15915ffdb80579ae21f69

command.py

@@ -218,11 +218,6 @@ class Command(object):
     return result
 
 
-# pylint: disable=W0223
-# Pylint warns that the `InteractiveCommand` and `PagedCommand` classes do not
-# override method `Execute` which is abstract in `Command`.  Since that method
-# is always implemented in classes derived from `InteractiveCommand` and
-# `PagedCommand`, this warning can be suppressed.
 class InteractiveCommand(Command):
   """Command which requires user interaction on the tty and
      must not run within a pager, even if the user asks to.
@@ -238,8 +233,6 @@ class PagedCommand(Command):
   def WantPager(self, _opt):
     return True
 
-# pylint: enable=W0223
-
 
 class MirrorSafeCommand(object):
   """Command permits itself to run within a mirror,