diff --git a/core/src/core/engine.adb b/core/src/core/engine.adb
deleted file mode 100644
index 9e1f9df..0000000
--- a/core/src/core/engine.adb
+++ /dev/null
@@ -1,34 +0,0 @@
---  The implementation of the Forge.
-package body Engine is
-
-   protected body Core_State is
-
-      --  Checked with the lock held.  Only Booting -> Synced is legal;
-      --  Fault_Halt is always reachable; anything else forces Fault_Halt.
-      procedure Transition_State (New_State : Engine_State) is
-      begin
-         if (Current_State = Booting and then New_State = Synced)
-           or else New_State = Fault_Halt
-         then
-            Current_State := New_State;
-         else
-            Current_State := Fault_Halt;
-         end if;
-      end Transition_State;
-
-      function Get_State return Engine_State is
-      begin
-         return Current_State;
-      end Get_State;
-
-   end Core_State;
-
-   --  The Pre guarantees Sender_Balance >= Amount, so this subtraction can
-   --  never underflow.  SPARK proves it statically; no runtime handler needed.
-   procedure Process_Transaction (Sender_Balance : in out Token_Amount;
-                                  Amount         : in     Token_Amount) is
-   begin
-      Sender_Balance := Sender_Balance - Amount;
-   end Process_Transaction;
-
-end Engine;