send-to-lava: don't warn on missing output

We might want to *not* have output for passing tests, at all.

Signed-off-by: Antonio Terceiro <antonio.terceiro@linaro.org>
diff --git a/automated/utils/send-to-lava.sh b/automated/utils/send-to-lava.sh
index d807237..fc24072 100755
--- a/automated/utils/send-to-lava.sh
+++ b/automated/utils/send-to-lava.sh
@@ -13,8 +13,6 @@
         echo "<LAVA_SIGNAL_STARTTC $test_name>"
         cat "$test_output"
         echo "<LAVA_SIGNAL_ENDTC $test_name>"
-    else
-        echo "WARNING: no log file found for ${test_name} at ${test_output}" >&2
     fi
 }