tuklib: Omit an unneeded <sys/types.h> from a tests.

tuklib_cpucores.c and tuklib_physmem.c don't include <sys/types.h>
even via other files in this package, so clearly that header isn't
needed in the tests either (no one has reported build problems due
to a missing header in a .c file).

m4/tuklib_cpucores.m4

@@ -95,7 +95,6 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #ifdef __QNX__
 compile error
 #endif
-#include <sys/types.h>
 #ifdef HAVE_SYS_PARAM_H
 #	include <sys/param.h>
 #endif

m4/tuklib_physmem.m4

@@ -88,7 +88,6 @@ main(void)
 ]])], [tuklib_cv_physmem_method=sysconf], [
 
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
-#include <sys/types.h>
 #ifdef HAVE_SYS_PARAM_H
 #	include <sys/param.h>
 #endif