lava-expect/hold_uart: Update description/removed TODO

These scripts are null for LAVA-based testing (as LAVA takes care of
that itself).

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Iecdc2405078fdee6952fdb3cda2d971b09d86f8f
diff --git a/lava-expect/uart-hold.inc b/lava-expect/uart-hold.inc
index 5ed1351..5752699 100644
--- a/lava-expect/uart-hold.inc
+++ b/lava-expect/uart-hold.inc
@@ -3,8 +3,9 @@
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
+# Original TCL expect/ArmCI description:
 # If we exit from a secondary uart, and if that had lots of prints, then the
 # model will stall. See: https://jira.arm.com/browse/SDDKW-43675. So, we wait
 # here expect for something that never arrives.
 
-# TODO
+# This functionality is not required for LAVA tests, so this file is empty.