scripts: Remove the "show-fixed-bugs.sh" file

Since we are not using Launchpad anymore, there is no more need for
this script.

Message-Id: <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Laurent Vivier <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>

Author: huth