test_upgrade: disable now unused function

src/microhttpd/test_upgrade.c

@@ -566,6 +566,7 @@ wr_create_from_plain_sckt (MHD_socket plain_sk)
 }
 
 
+#if 0 /* Disabled code */
 /**
  * Check whether shutdown of connection was received from remote
  * @param s socket to check
@@ -579,6 +580,9 @@ wr_is_eof_received (struct wr_socket *s)
 }
 
 
+#endif /* Disabled code */
+
+
 enum wr_wait_for_type
 {
   WR_WAIT_FOR_RECV = 0,