[roll] Roll fuchsia [time][test] Remove now unused functions

Now that the bespoke tests have been replaced by TTRF
based tests, there is no reason to have two constructor
functions for the nested timekeeper realm.

Therefore, removing.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/949527
Original-Revision: b61b88451b7fe8f6f6156ed2d942ab6d83f5b907
GitOrigin-RevId: a80351dfd4e325645bcb2190148e9203c0e7e20c
Change-Id: I99acbd61d0a3b98a55967787ccce3075a1e6a062
diff --git a/stem b/stem
index b5e6ceb..2624d3e 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="ad14f558215fd11c562ef799501aa87ca939551b"/>
+             revision="b61b88451b7fe8f6f6156ed2d942ab6d83f5b907"/>
   </projects>
   <hooks>
     <hook name="install-environment"