1 files changed, 1 insertions, 8 deletions
diff --git a/Source/cmDefinitions.h b/Source/cmDefinitions.h
index 0e38fb1..b650aa8 100644
--- a/Source/cmDefinitions.h
+++ b/Source/cmDefinitions.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmDefinitions_h
-#define cmDefinitions_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -48,9 +47,6 @@ public:
   /** Unset a definition.  */
   void Unset(const std::string& key);
 
-  /** List of unused keys.  */
-  std::vector<std::string> UnusedKeys() const;
-
 private:
   /** String with existence boolean.  */
   struct Def
@@ -62,7 +58,6 @@ private:
     {
     }
     cm::String Value;
-    bool Used = false;
   };
   static Def NoDef;
 
@@ -71,5 +66,3 @@ private:
   static Def const& GetInternal(const std::string& key, StackIter begin,
                                 StackIter end, bool raise);
 };
-
-#endif