lint: clean up old statements

We can delete a number of disable statements that are no longer relevant,
replace the W/E/F constants with their human readable names, and scope a
few to where they're needed instead of disabling in the entire module.

BUG=None
TEST=`cros lint` is unchanged

Change-Id: Ic7ac1ab410917b075212b38412f8a1e381b8b915
Reviewed-on: https://chromium-review.googlesource.com/1135635
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
diff --git a/cli/command_unittest.py b/cli/command_unittest.py
index f228e11..1c1abf1 100644
--- a/cli/command_unittest.py
+++ b/cli/command_unittest.py
@@ -49,7 +49,7 @@
   def testBadUseOfCommandDecorator(self):
     """Tests that our decorator correctly rejects bad test commands."""
     try:
-      # pylint: disable=W0612
+      # pylint: disable=unused-variable
       @command.CommandDecorator('bad')
       class BadTestCommand(object):
         """A command that wasn't implemented correctly."""
@@ -97,7 +97,7 @@
 class CommandTest(cros_test_lib.MockTestCase):
   """This test class tests that we can load modules correctly."""
 
-  # pylint: disable=W0212
+  # pylint: disable=protected-access
 
   def testFindModules(self):
     """Tests that we can return modules correctly when mocking out glob."""