Revert "subtree updates"

Needs to go through CI

This reverts commit fc7e7973f3119e2bad511209aa336537dc5ffbed.
diff --git a/meta-arm/ci/corstone500.yml b/meta-arm/ci/corstone500.yml
new file mode 100644
index 0000000..2172bc1
--- /dev/null
+++ b/meta-arm/ci/corstone500.yml
@@ -0,0 +1,12 @@
+header:
+  version: 14
+  includes:
+    - ci/base.yml
+    - ci/fvp.yml
+    - ci/poky-tiny.yml
+
+local_conf_header:
+  fvp-config: |
+    IMAGE_FEATURES:remove = " ssh-server-dropbear"
+
+machine: corstone500