Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

1 files changed, 0 insertions, 6 deletions

diff --git a/test/c.service b/test/c.service
deleted file mode 100644
index e2f60a8fbf..0000000000
--- a/test/c.service
+++ /dev/null
@@ -1,6 +0,0 @@
-[Unit]
-Description=C
-Requires=a.service
-
-[Service]
-ExecStart=/bin/true