shell32: Remove redundant function declaration

[Andrew Talbot]

Changelog:
    shell32: Remove redundant function declaration. SHELL_CreateContextMenu(),
in shell32/shlmenu.c, is now static.

diff --git a/dlls/shell32/shfldr.h b/dlls/shell32/shfldr.h
index 7d33d27..052b040 100644
--- a/dlls/shell32/shfldr.h
+++ b/dlls/shell32/shfldr.h
@@ -75,9 +75,5 @@ static inline int SHELL32_GUIDToStringW (REFGUID guid, LPWSTR str)
 void SHELL_FS_ProcessDisplayFilename(LPWSTR szPath, DWORD dwFlags) DECLSPEC_HIDDEN;
 BOOL SHELL_FS_HideExtension(LPCWSTR pwszPath) DECLSPEC_HIDDEN;
 
-HRESULT SHELL_CreateContextMenu(HWND hwnd, IContextMenu* system_menu,
-                                IShellFolder *folder, LPCITEMIDLIST folder_pidl,
-                                LPCITEMIDLIST *apidl, UINT cidl, const HKEY *aKeys,
-                                UINT cKeys,REFIID riid, void** ppv) DECLSPEC_HIDDEN;
 DEFINE_GUID( CLSID_UnixFolder, 0xcc702eb2, 0x7dc5, 0x11d9, 0xc6, 0x87, 0x00, 0x04, 0x23, 0x8a, 0x01, 0xcd );
 DEFINE_GUID( CLSID_UnixDosFolder, 0x9d20aae8, 0x0625, 0x44b0, 0x9c, 0xa7, 0x71, 0x88, 0x9c, 0x22, 0x54, 0xd9 );