Remove some spurious #includes

[originally from svn r644]

sshbn.c

@@ -6,11 +6,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <stdio.h> /* FIXME */
-#include <stdarg.h> /* FIXME */
-#include <windows.h> /* FIXME */
-#include "putty.h" /* FIXME */
-
 #include "ssh.h"
 
 unsigned short bnZero[1] = { 0 };

sshdes.c

@@ -1,8 +1,4 @@
 #include <assert.h>
-#include <stdio.h> /* FIXME */
-#include <stdarg.h> /* FIXME */
-#include <windows.h> /* FIXME */
-#include "putty.h" /* FIXME */
 #include "ssh.h"