diff --git a/src/types.rs b/src/types.rs
deleted file mode 100644
index 673fa81..0000000
--- a/src/types.rs
+++ /dev/null
@@ -1,10 +0,0 @@
-pub const SIZE: usize = 3072;
-pub type Data = iso7816::Data<SIZE>;
-
-interchange::interchange! {
-    Contact: (Data, Data)
-}
-
-interchange::interchange! {
-    Contactless: (Data, Data)
-}