Relanding: Removing #defines previously used for building without BoringSSL/OpenSSL.

webrtc/base/openssldigest.cc

Index: webrtc/base/openssldigest.cc
diff --git a/webrtc/base/openssldigest.cc b/webrtc/base/openssldigest.cc
index 2618b7f9fd2ec1a8025bd33f3ef53452f8eb9c28..0413f8f41055c720f28f099e2b90b77fc90905b3 100644
--- a/webrtc/base/openssldigest.cc
+++ b/webrtc/base/openssldigest.cc
@@ -8,8 +8,6 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#if HAVE_OPENSSL_SSL_H
-
 #include "webrtc/base/openssldigest.h"
 
 #include "webrtc/base/checks.h"
@@ -118,5 +116,3 @@ bool OpenSSLDigest::GetDigestSize(const std::string& algorithm,
 }
 
 }  // namespace rtc
-
-#endif  // HAVE_OPENSSL_SSL_H