diff --git a/src/functions.h b/src/functions.h
--- a/src/functions.h
+++ b/src/functions.h
@@ -33,10 +33,6 @@ void PlaceTreesRandomly();
 
 void InitializeLandscapeVariables(bool only_constants);
 
-/* misc.cpp */
-bool IsCustomName(StringID id);
-char *CopyFromOldName(StringID id);
-
 /* misc functions */
 /**
  * Mark a tile given by its coordinate dirty for repaint.
@@ -68,11 +64,8 @@ void AskExitToGameMenu();
 
 void RedrawAutosave();
 
-StringID RemapOldStringID(StringID s);
-
 void UpdateViewportSignPos(ViewportSign *sign, int left, int top, StringID str);
 
-
 /* callback from drivers that is called if the game size changes dynamically */
 void GameSizeChanged();
 const char *GetCurrentLocale(const char *param);