Merge pull request drowe67#315 from drowe67/ms-include-cleanup

Remove duplicate includes.

Author: drowe67

src/freedv_data_rx.c

@@ -31,8 +31,6 @@
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
 #include <stdint.h>
 #include <stdbool.h>