e2fsprogs: remove checker infrastructure

Per http://www.gnu.org/software/checker/ the gcc "-checker" option
is long deprecated.  Nuke it from e2fsprogs.

Most people would never hit this, but people who love to turn knobs,
such as the reporter of kernel.org bz#74171, might run into it and be
sad.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
12 files changed