src: remove experimental warning for inspect

* Removes "experimental" warning.

Fixes: https://github.com/nodejs/node/issues/11770
PR-URL: https://github.com/nodejs/node/pull/12352
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Alexey Orlenko <eaglexrlnk@gmail.com>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

src/inspector_socket_server.cc

@@ -82,9 +82,7 @@ void PrintDebuggerReadyMessage(const std::string& host,
     return;
   }
   fprintf(out,
-          "Debugger listening on %s:%d.\n"
-          "Warning: This is an experimental feature "
-          "and could change at any time.\n",
+          "Debugger listening on %s:%d.\n",
           host.c_str(), port);
   if (ids.size() == 1)
     fprintf(out, "To start debugging, open the following URL in Chrome:\n");