[3.9] bpo-43710: Rollback the 3.9 bpo-42500 fix, it broke the ABI in 3.9.3 (#25179)

This reverts commit 8b795ab5541d8a4e69be4137dfdc207714270b77.

It changed the PyThreadState structure size, breaking the ABI in 3.9.3.

1 files changed, 0 insertions, 3 deletions

diff --git a/Python/errors.c b/Python/errors.c
index d8c2d8b923..87af39d527 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -290,14 +290,12 @@ _PyErr_NormalizeException(PyThreadState *tstate, PyObject **exc,
                           PyObject **val, PyObject **tb)
 {
     int recursion_depth = 0;
-    tstate->recursion_headroom++;
     PyObject *type, *value, *initial_tb;
 
   restart:
     type = *exc;
     if (type == NULL) {
         /* There was no exception, so nothing to do. */
-        tstate->recursion_headroom--;
         return;
     }
 
@@ -349,7 +347,6 @@ _PyErr_NormalizeException(PyThreadState *tstate, PyObject **exc,
     }
     *exc = type;
     *val = value;
-    tstate->recursion_headroom--;
     return;
 
   error: