Remove obsolete workaround for newline added by pipe.communicate()

Older versions of the python runtime would add a newline to output
obtained via pipe.communicate(). Current versions do not leading
to output being stored in reports without a trailing newline
character.

Remove the workaround to ensure that stored content matches that
obtained via simple shell redirection ("/some/command > file").

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>