diff --git a/lib/debug/server_dap.rb b/lib/debug/server_dap.rb
index 25abec5d1..0041b9027 100644
--- a/lib/debug/server_dap.rb
+++ b/lib/debug/server_dap.rb
@@ -437,14 +437,6 @@ def process
 
     ## called by the SESSION thread
 
-    def readline prompt
-      @q_msg.pop || 'kill!'
-    end
-
-    def sock skip: false
-      yield $stderr
-    end
-
     def respond req, res
       send_response(req, **res)
     end