Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/md4.h

@@ -0,0 +1,35 @@
+#ifndef CRYPTOPP_MD4_H
+#define CRYPTOPP_MD4_H
+
+#include "iterhash.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+namespace Weak1 {
+
+/// <a href="http://www.weidai.com/scan-mirror/md.html#MD4">MD4</a>
+/*! \warning MD4 is considered insecure, and should not be used
+	unless you absolutely need it for compatibility. */
+class MD4 : public IteratedHashWithStaticTransform<word32, LittleEndian, 64, 16, MD4>
+{
+public:
+	static void InitState(HashWordType *state);
+	static void Transform(word32 *digest, const word32 *data);
+	CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "MD4";}
+};
+
+}
+#if CRYPTOPP_ENABLE_NAMESPACE_WEAK >= 1
+namespace Weak {using namespace Weak1;}		// import Weak1 into CryptoPP::Weak
+#else
+using namespace Weak1;	// import Weak1 into CryptoPP with warning
+#ifdef __GNUC__
+#warning "You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning."
+#else
+#pragma message("You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning.")
+#endif
+#endif
+
+NAMESPACE_END
+
+#endif