Didn't mean to add this (yet), removing.

diff --git a/simgear b/simgear
deleted file mode 160000 (submodule)
index d11db8a..0000000
--- a/simgear
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit d11db8a67ad43adff97a68b51a83570b2a5e02bf