Update git submodules

* Update docs/submodules/moon from branch 'master'
  - Merge "Delete some unneeded files"
  - Delete some unneeded files

    Change-Id: I6bd7372751af70daa9cbb9ebcfb53ab529ce8284

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 05a6304..2c1d6d4 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 05a6304565bbf435f138dee8e83f89e8daf3e784
+Subproject commit 2c1d6d454a1df6b7dd1d1b6601ed02f7a33eefb9