Delete submodules

diff --git a/modules/atf b/modules/atf
deleted file mode 160000 (submodule)
index 0110dca..0000000
--- a/modules/atf
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 0110dca83199322915e157fc1278ee6b58dfb4f8

diff --git a/modules/libcds b/modules/libcds
deleted file mode 160000 (submodule)
index a239e68..0000000
--- a/modules/libcds
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit a239e68f5e8711583d9bf5aeedf6365e759f3d84

diff --git a/modules/libopts b/modules/libopts
deleted file mode 160000 (submodule)
index f0ea1b6..0000000
--- a/modules/libopts
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit f0ea1b6d1c01ef84a6eb12bd05829c57dd0bceb4