more c99 updates

This commit does two things. It removes checks for C99 required
headers (stdlib.h, string.h, signal.h, etc). Additionally it removes
definitions for required C99 types (intptr_t, int64_t, int32_t, etc).

Signed-off-by: Nathan Hjelm <hjelmn@me.com>

opal/mca/pstat/linux/pstat_linux_module.c

@@ -34,9 +34,7 @@
 #include <string.h>
 #include <errno.h>
 #include <ctype.h>
-#ifdef HAVE_TIME_H
 #include <time.h>
-#endif
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif