[examples] Soft transition spinning-cube GN label.

Finish soft transition by removing :spinning_cube
GN label.

Bug: 58701
Change-Id: Id049ee28e0cdb8409042a5a4373c431fca5e17e9
Reviewed-on: https://fuchsia-review.googlesource.com/c/experiences/+/419417
Commit-Queue: Darren Chan <chandarren@google.com>
Reviewed-by: Shai Barack <shayba@google.com>
Reviewed-by: Chase Latta <chaselatta@google.com>
diff --git a/examples/spinning_cube/BUILD.gn b/examples/spinning_cube/BUILD.gn
index f4bf37a..23c13f0 100644
--- a/examples/spinning_cube/BUILD.gn
+++ b/examples/spinning_cube/BUILD.gn
@@ -28,8 +28,3 @@
     ":component"
   ]
 }
-
-# @TODO(fxb/58701): For purposes of soft transition.
-group("spinning_cube") {
-  deps = [ ":spinning-cube" ]
-}