Remove row-spanning cell, which the Sphinx text writer does not support.
diff --git a/Doc/c-api/apiabiversion.rst b/Doc/c-api/apiabiversion.rst
index f6d52df..890a038 100644
--- a/Doc/c-api/apiabiversion.rst
+++ b/Doc/c-api/apiabiversion.rst
@@ -28,7 +28,7 @@
| | | ``0xB`` for beta, ``0xC`` for release |
| | | candidate and ``0xF`` for final), in this |
| | | case it is alpha. |
- | +-------------------------+------------------------------------------------+
+ +-------+-------------------------+------------------------------------------------+
| | ``29-32`` | ``PY_RELEASE_SERIAL`` (the ``2`` in |
| | | ``3.4.1a2``, zero for final releases) |
+-------+-------------------------+------------------------------------------------+