anyauthput.c: stdint.h must not be included unconditionally

As it is already included by curlbuild.h if it exists on the platform it
was included here superfluously anyway.

Reported by: Dagobert Michelsen
Bug: http://curl.haxx.se/bug/view.cgi?id=3294509

docs/examples/anyauthput.c

@@ -26,8 +26,6 @@
 #else
 #  ifdef __VMS
      typedef int intptr_t;
-#  else
-#    include <stdint.h>
 #  endif
 #  include <unistd.h>
 #endif