Remove unused build dependency on Cython

Also, remove duplicate build dependency on pytest

python-cffi.spec

@@ -1,6 +1,6 @@
 Name:           python-cffi
 Version:        1.12.2
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Foreign Function Interface for Python to call C code
 License:        MIT
 URL:            https://cffi.readthedocs.org/
@@ -27,9 +27,7 @@ Summary:        Foreign Function Interface for Python 3 to call C code
 BuildRequires:  python2-pytest
 BuildRequires:  python2-devel
 BuildRequires:  python2-setuptools
-BuildRequires:  python2-Cython
 BuildRequires:  python2-pycparser
-BuildRequires:  python2-pytest
 %{?python_provide:%python_provide python2-cffi}
 
 %description -n python2-cffi
@@ -43,9 +41,7 @@ BuildRequires:  python3-sphinx
 BuildRequires:  python3-pytest
 BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
-BuildRequires:  python3-Cython
 BuildRequires:  python3-pycparser
-BuildRequires:  python3-pytest
 %{?python_provide:%python_provide python3-cffi}
 
 %description -n python3-cffi
@@ -97,6 +93,10 @@ PYTHONPATH=%{buildroot}%{python3_sitearch} %{__python3} -m pytest c/ testing/
 %doc doc/build/html
 
 %changelog
+* Mon Jul 15 2019 Petr Viktorin <pviktori@redhat.com> - 1.12.2-2
+- Remove unused build dependency on Cython
+- Remove duplicate build dependency on pytest
+
 * Wed Mar 27 2019 Miro Hrončok <mhroncok@redhat.com> - 1.12.2-1
 - Update to 1.12.2 (#1677888)