diff --git a/src/script/script.h b/src/script/script.h
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -631,24 +631,6 @@
     }
 };
 
-struct CScriptWitness {
-    // Note that this encodes the data elements being pushed, rather than
-    // encoding them as a CScript that pushes them.
-    std::vector<std::vector<uint8_t>> stack;
-
-    // Some compilers complain without a default constructor
-    CScriptWitness() {}
-
-    bool IsNull() const { return stack.empty(); }
-
-    void SetNull() {
-        stack.clear();
-        stack.shrink_to_fit();
-    }
-
-    std::string ToString() const;
-};
-
 class CReserveScript {
 public:
     CScript reserveScript;
diff --git a/src/script/script.cpp b/src/script/script.cpp
--- a/src/script/script.cpp
+++ b/src/script/script.cpp
@@ -462,14 +462,3 @@
 bool CScript::IsPushOnly() const {
     return this->IsPushOnly(begin());
 }
-
-std::string CScriptWitness::ToString() const {
-    std::string ret = "CScriptWitness(";
-    for (unsigned int i = 0; i < stack.size(); i++) {
-        if (i) {
-            ret += ", ";
-        }
-        ret += HexStr(stack[i]);
-    }
-    return ret + ")";
-}