[roll] Roll fuchsia [appmgr] Remove unused uses of fuchsia.sys.Loader

Original-Bug: 103486
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/703736
Original-Revision: 5522475263fda82c356f315bfe048c16c6cae5f1
GitOrigin-RevId: 86f29108881f4486d543b4ed47d168fc0d6b98cd
Change-Id: I4c24e7f3a3f676eccf5c9e231c2de172b02e1263

stem

diff --git a/stem b/stem
index 1496d41..8b0c57b 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="989ec393e61fa4247e7a9021f3b669c063dd5e4d"/>
+             revision="5522475263fda82c356f315bfe048c16c6cae5f1"/>
   </projects>
   <hooks>
     <hook name="install-environment"