aio: prewarm: remove error message that was just a test.

Author:
Reviewed-By:
Discussion: https://postgr.es/m/
Backpatch:

diff --git a/contrib/pg_prewarm/pg_prewarm.c b/contrib/pg_prewarm/pg_prewarm.c
index a921c4c63896fd2a6ff417dc9065df79356ef4b0..0ba508aa4dd4c04ef97557cd53360bab0559b7b6 100644 (file)
--- a/contrib/pg_prewarm/pg_prewarm.c
+++ b/contrib/pg_prewarm/pg_prewarm.c
@@ -356,8 +356,6 @@ pg_prewarm(PG_FUNCTION_ARGS)
            r = (Page) pg_streaming_read_get_next(pgsr);
            if (r == 0)
                elog(ERROR, "prefetch ended early");
-           if (PageIsEmpty(r))
-               elog(ERROR, "page empty");
 
            ++blocks_done;
        }