Updated git submodules

Project: releng/builder master 7e320478c000112a422456320d742dd822e156c4

Merge "Remove unused script"

Remove unused script

stack-delete is no longer used. We have been using a regularly running
global stack delete job for months now with great success so we likely
no longer need this.

Change-Id: Ie97b3ac76c60805128a7d696ebe0154b568abc6b
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

diff --git a/docs/submodules/releng/builder b/docs/submodules/releng/builder
index 3344238c3947cab9d3963345ff7839373f10178e..7e320478c000112a422456320d742dd822e156c4 160000 (submodule)
--- a/docs/submodules/releng/builder
+++ b/docs/submodules/releng/builder
@@ -1 +1 @@
-Subproject commit 3344238c3947cab9d3963345ff7839373f10178e
+Subproject commit 7e320478c000112a422456320d742dd822e156c4