Remove unused method parseProtocolMessage in string-util.h.

Change-Id: I05d69c8971352276c2d399f458f8f7ae6c2689c2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1639575
Auto-Submit: Johannes Henkel <johannes@chromium.org>
Commit-Queue: Johannes Henkel <johannes@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61974}

src/inspector/string-util.cc

@@ -125,12 +125,6 @@ std::unique_ptr<protocol::Value> StringUtil::parseJSON(const String16& string) {
                              static_cast<int>(string.length()));
 }
 
-// static
-std::unique_ptr<protocol::Value> StringUtil::parseProtocolMessage(
-    const ProtocolMessage& message) {
-  return parseJSON(message.json);
-}
-
 // static
 ProtocolMessage StringUtil::jsonToMessage(String message) {
   ProtocolMessage result;

src/inspector/string-util.h

@@ -63,8 +63,6 @@ class StringUtil {
   }
   static std::unique_ptr<protocol::Value> parseJSON(const String16& json);
   static std::unique_ptr<protocol::Value> parseJSON(const StringView& json);
-  static std::unique_ptr<protocol::Value> parseProtocolMessage(
-      const ProtocolMessage&);
   static ProtocolMessage jsonToMessage(String message);
   static ProtocolMessage binaryToMessage(std::vector<uint8_t> message);