Remove the upper version bound from expat library

It's already greater than 2.6 in all Fedoras.

python3.13.spec

@@ -243,8 +243,7 @@ Obsoletes: python%{pybasever}%{?1:-%{1}}\
 BuildRequires: autoconf
 BuildRequires: bluez-libs-devel
 BuildRequires: bzip2-devel
-# See the runtime requirement in the -libs subpackage
-BuildRequires: expat-devel >= 2.6
+BuildRequires: expat-devel
 BuildRequires: findutils
 BuildRequires: gcc
 BuildRequires: gdbm-devel
@@ -536,14 +535,6 @@ Recommends: (%{pkgname}-tkinter%{?_isa} = %{version}-%{release} if tk%{?_isa})
 # The zoneinfo module needs tzdata
 Requires: tzdata
 
-# The requirement on libexpat is generated, but we need to version it.
-# When built with expat >= 2.6, but installed with older expat, we get:
-#   ImportError: /usr/lib64/python3.X/lib-dynload/pyexpat.cpython-....so:
-#   undefined symbol: XML_SetReparseDeferralEnabled
-# This breaks many things, including python -m venv.
-# Other subpackages (like -debug) also need this, but they all depend on -libs.
-Requires: expat >= 2.6
-
 %description -n %{pkgname}-libs
 This package contains runtime libraries for use by Python:
 - the majority of the Python standard library
@@ -720,7 +711,6 @@ License: %{libs_license} AND Apache-2.0 AND BSD-2-Clause AND BSD-3-Clause AND IS
 Provides: bundled(libb2) = 0.98.1
 Provides: bundled(mimalloc) = 2.12
 Requires: tzdata
-Requires: expat >= 2.6
 
 %description -n python%{pybasever}-freethreading
 The provisional Free Threading (PEP 703) build of Python.