Remove submodules.

diff --git a/src/rdns b/src/rdns
deleted file mode 160000 (submodule)
index 5d3d95e..0000000
--- a/src/rdns
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 5d3d95e6a5392b88a37dbbea237c5fe91b0a2632

diff --git a/src/ucl b/src/ucl
deleted file mode 160000 (submodule)
index 0d80fb8..0000000
--- a/src/ucl
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 0d80fb8fb4c43c90e79144acdad27868828ef700