closes bpo-39261: Remove dead assignment from pyinit_config. (GH-17907)

diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index 94bbbdb..1d9dff4 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -749,7 +749,6 @@
     if (_PyStatus_EXCEPTION(status)) {
         return status;
     }
-    config = &tstate->interp->config;
     *tstate_p = tstate;
 
     status = pycore_interp_init(tstate);