remove include that was added

Author: willco007

src/sftp.c

@@ -47,7 +47,6 @@
 #include "sftp.h"
 
 #include <assert.h>
-#include <stdint.h>
 #include <stdlib.h>  /* strtol() */
 
 /* This release of libssh2 implements Version 5 with automatic downgrade