Revert "gh-76785: Print the Traceback from Interpreter.run() (gh-110248)" (gh-110314)

This reverts commit 6bc889aedc.

That commit is causing some buildbot failures.

Modules/_xxsubinterpretersmodule.c

@@ -450,10 +450,6 @@ error:
                 "RunFailedError: script raised an uncaught exception (%s)",
                 failure);
     }
-    // XXX Instead, store the rendered traceback on sharedexc,
-    // attach it to the exception when applied,
-    // and teach PyErr_Display() to print it.
-    PyErr_Display(NULL, excval, NULL);
     Py_XDECREF(excval);
     if (errcode != ERR_ALREADY_RUNNING) {
         _PyInterpreterState_SetNotRunningMain(interp);