container_of: relicense to Public domain

[ccan] / ccan / container_of / LICENSE

diff --git a/ccan/container_of/LICENSE b/ccan/container_of/LICENSE
deleted file mode 120000 (symlink)
index dc314ec..0000000
--- a/ccan/container_of/LICENSE
+++ /dev/null
@@ -1 +0,0 @@
-../../licenses/LGPL-2.1
\ No newline at end of file