Dialer: remove README with false statement pulled from upstream

Change-Id: If3fcf0be3a4d153bfcf90216caea22707226a84a
diff --git a/README b/README
deleted file mode 100644
index 15142ba..0000000
--- a/README
+++ /dev/null
@@ -1,2 +0,0 @@
-This app is not actively supported and the source is only available as a reference. This project will be removed from the source manifest sometime in the future.
-