src: fix -Wunreachable-code-return error

PR-URL: #40034
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

Author: codebytere

src/inspector_agent.cc

@@ -87,7 +87,6 @@ inline void* StartIoThreadMain(void* unused) {
     if (agent != nullptr)
       agent->RequestIoThreadStart();
   }
-  return nullptr;
 }
 
 static int StartDebugSignalHandler() {

src/node_url.cc

@@ -600,7 +600,6 @@ std::string URLHost::ToString() const {
     case HostType::H_DOMAIN:
     case HostType::H_OPAQUE:
       return value_.domain_or_opaque;
-      break;
     case HostType::H_IPV4: {
       dest.reserve(15);
       uint32_t value = value_.ipv4;