Remove QuicUtils::AsChars by casting directly. No behavior change.

net/quic/core/quic_utils.h

Index: net/quic/core/quic_utils.h
diff --git a/net/quic/core/quic_utils.h b/net/quic/core/quic_utils.h
index a68a0608fb0dc3e8e47a27716a8c1de89ec5ccfb..9ba914f34f353e48ea1bec6b0a6b93d1ae78393c 100644
--- a/net/quic/core/quic_utils.h
+++ b/net/quic/core/quic_utils.h
@@ -71,10 +71,6 @@ class NET_EXPORT_PRIVATE QuicUtils {
   // Returns PeerAddressChangeType as a std::string.
   static std::string PeerAddressChangeTypeToString(PeerAddressChangeType type);
 
-  static char* AsChars(unsigned char* data) {
-    return reinterpret_cast<char*>(data);
-  }
-
   // Deletes all the sub-frames contained in |frames|.
   static void DeleteFrames(QuicFrames* frames);