Incorporate feedback

Author: kleisauke

src/library_pthread.js

@@ -991,10 +991,6 @@ var LibraryPThread = {
     if (!ENVIRONMENT_IS_PTHREAD) _exit(status);
     else PThread.threadExit(status);
     // pthread_exit is marked noReturn, so we must not return from it.
-    if (ENVIRONMENT_IS_NODE) {
-      // set the exit code while letting the process exit gracefully
-      process.exitCode = status;
-    }
     throw 'unwind';
   },