Unbreak build with opaque EVP_MD_CTX in LibreSSL 3.5.

Index: src/h235auth1.cxx
--- src/h235auth1.cxx.orig
+++ src/h235auth1.cxx
@@ -68,7 +68,7 @@ static const BYTE SearchPattern[HASH_SIZE] = { // Must
 #define SHA_BLOCKSIZE   64
 #endif
 
-#if (OPENSSL_VERSION_NUMBER < 0x10100000L) || defined(LIBRESSL_VERSION_NUMBER)
+#if (OPENSSL_VERSION_NUMBER < 0x10100000L)
 
 namespace {
 
