chromite: Ensure chromite lints (mostly) clean after pylint uprev

 - remove suppressions for obsolete lint warnings
 - rename suppressions that have been split (arguments-differ)
 - suppress most of the "consider using.." warnings
 - delete unused variables on except: lines
 - fix some obvious things

BUG=b:236161656
TEST=./run_tests

Change-Id: I3a4af178b29687be23215452aa19c10aa83cb52e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/4505565
Tested-by: Trent Apted <tapted@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Trent Apted <tapted@chromium.org>
diff --git a/scripts/cros_gdb.py b/scripts/cros_gdb.py
index 9c1f098..753d823 100644
--- a/scripts/cros_gdb.py
+++ b/scripts/cros_gdb.py
@@ -807,4 +807,6 @@
         if options.debug:
             raise
         else:
+            # TODO(b/236161656): Fix.
+            # pylint: disable-next=raising-bad-type
             raise cros_build_lib.Die(str(e))