We no longer need to include headers we don't use for sudo*.h files.

Previously we needed to include headers required by the various
sudo*h files.  Now those files are more self-sufficient and we
should only include headers needed by code in the various .c files.

plugins/python/regress/testhelpers.h

@@ -19,8 +19,6 @@
 #ifndef PYTHON_TESTHELPERS
 #define PYTHON_TESTHELPERS
 
-#include <sys/wait.h>
-
 #include "iohelpers.h"
 
 #include "../pyhelpers.h"