diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index 60a8a2655d3..bf2a6b7b3c0 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -251,18 +251,11 @@ struct Stacks
     std::vector<valtype> script;
     std::vector<valtype> witness;
 
-    Stacks() {}
-    explicit Stacks(const std::vector<valtype>& scriptSigStack_) : script(scriptSigStack_), witness() {}
+    Stacks() = delete;
+    Stacks(const Stacks&) = delete;
     explicit Stacks(const SignatureData& data) : witness(data.scriptWitness.stack) {
         EvalScript(script, data.scriptSig, SCRIPT_VERIFY_STRICTENC, BaseSignatureChecker(), SigVersion::BASE);
     }
-
-    SignatureData Output() const {
-        SignatureData result;
-        result.scriptSig = PushAll(script);
-        result.scriptWitness.stack = witness;
-        return result;
-    }
 };
 }