abipkgdiff: minor cleanups

The recent changes to abipkgdiff triggered some minor clang-tidy
diagnostics that I address in this patch.

 - removed unused using statements
 - cleaned up some mismatches between commented and actual parameter names
 - removed shadowing data members from self_compare_task and construct
   with base class constructor instead.

	* tools/abipkgdiff.cc: remove unused using statements
	(self_compare_task): remove shadowing members and delegate
	construction to base class.

Signed-off-by: Matthias Maennich <maennich@google.com>
1 file changed