Delete unused role checking.

When check rdb file, it is unnecessary to check role.

src/redis-check-rdb.c

@@ -286,12 +286,8 @@ int redis_check_rdb(char *rdbfilename, FILE *fp) {
         /* Read value */
         rdbstate.doing = RDB_CHECK_DOING_READ_OBJECT_VALUE;
         if ((val = rdbLoadObject(type,&rdb)) == NULL) goto eoferr;
-        /* Check if the key already expired. This function is used when loading
-         * an RDB file from disk, either at startup, or when an RDB was
-         * received from the master. In the latter case, the master is
-         * responsible for key expiry. If we would expire keys here, the
-         * snapshot taken by the master may not be reflected on the slave. */
-        if (server.masterhost == NULL && expiretime != -1 && expiretime < now)
+        /* Check if the key already expired. */
+        if (expiretime != -1 && expiretime < now)
             rdbstate.already_expired++;
         if (expiretime != -1) rdbstate.expires++;
         rdbstate.key = NULL;