diff --git a/src/helper.h b/src/helper.h
index ae0b5eab..e1687458 100644
--- a/src/helper.h
+++ b/src/helper.h
@@ -14,24 +14,6 @@ typedef struct _ICON_INFORMATION
 	LONG uwp_icon_id;
 } ICON_INFORMATION, *PICON_INFORMATION;
 
-// CryptCATAdminAcquireContext2 (win8+)
-typedef BOOL (WINAPI *CCAAC2)(
-	_Out_ PHANDLE hcat_admin,
-	_In_opt_ LPCGUID pgSubsystem,
-	_In_opt_ PCWSTR pwszHashAlgorithm,
-	_In_opt_ PCCERT_STRONG_SIGN_PARA pStrongHashPolicy,
-	_Reserved_ DWORD dwFlags
-	);
-
-// CryptCATAdminCalcHashFromFileHandle2 (win8+)
-typedef BOOL (WINAPI *CCAHFFH2)(
-	_In_ HCATADMIN hCatAdmin,
-	_In_ HANDLE hFile,
-	_Inout_ DWORD *pcbHash,
-	_Out_writes_bytes_to_opt_ (*pcbHash, *pcbHash) BYTE *pbHash,
-	_Reserved_ DWORD dwFlags
-	);
-
 #define FMTADDR_AS_RULE 0x0001
 #define FMTADDR_USE_PROTOCOL 0x0002