Avoid python-jedi dependency in RHEL builds

python-jedi is unwanted in RHEL; the tests which use it are skipped
if absent, see the comment for details.

Co-Authored-By: Miro Hrončok <miro@hroncok.cz>

Cython.spec

@@ -6,7 +6,7 @@
 
 Name:           Cython
 Version:        0.29.34
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Language for writing Python extension modules
 
 License:        Apache-2.0
@@ -24,8 +24,15 @@ BuildRequires:  python3-setuptools
 %if %{with tests}
 BuildRequires:  gcc-c++
 BuildRequires:  python3-numpy
+# The tests requiring jedi are optional and skipped when jedi is not installed.
+# Note that the jedi tests were forcefully disabled a long time ago,
+# in https://github.com/cython/cython/issues/1845 far, far away.
+# We keep the dependency here so we don't forget to re-add it once the balance is restored.
+# We don't want to pull in jedi to RHEL just to potentially run more tests.
+%if %{undefined rhel}
 BuildRequires:  python3-jedi
 %endif
+%endif
 
 %if %{with cython_compile}
 BuildRequires:  gcc
@@ -133,6 +140,9 @@ cp -p cython-mode-init.el cython-mode-init.elc %{buildroot}%{_emacs_sitestartdir
 
 
 %changelog
+* Wed May 24 2023 Yaakov Selkowitz <yselkowi@redhat.com> - 0.29.34-2
+- Avoid python-jedi dependency in RHEL builds
+
 * Mon Apr 03 2023 Miro Hrončok <mhroncok@redhat.com> - 0.29.34-1
 - Update to 0.29.34
 - Fixes: rhbz#1823181