Remove infinite loop from PSYNC test.

Added for debugging and forgot there.

tests/integration/replication-psync.tcl

@@ -102,10 +102,8 @@ test_psync {ok psync} 6 1000000 3600 0 {
     assert {[s -1 sync_partial_ok] > 0}
 }
 
-while 1 {
-    test_psync {no backlog} 6 100 3600 0.5 {
-        assert {[s -1 sync_partial_err] > 0}
-    }
+test_psync {no backlog} 6 100 3600 0.5 {
+    assert {[s -1 sync_partial_err] > 0}
 }
 
 test_psync {ok after delay} 3 100000000 3600 3 {