!6 delete about python2 subpackage and use python3 replace python2 for build

From: @yeah_wang
Reviewed-by: @zengwefeng
Signed-off-by: @zengwefeng

python-ipaddress.spec

@@ -1,6 +1,6 @@
 Name:             python-ipaddress
 Version:          1.0.23
-Release:          1
+Release:          2
 Summary:          IPv4/IPv6 manipulation library
 License:          Python	
 URL:              https://github.com/phihag/ipaddress
@@ -8,73 +8,36 @@ Source0:          https://pypi.io/packages/source/i/ipaddress/ipaddress-%{versio
 
 BuildArch:        noarch
 
-%if 0%{?with_python2}
-BuildRequires:    python2-devel python2-setuptools
-%endif
-
-%if 0%{?with_python3}
 BuildRequires:    python3-devel python3-setuptools
-%endif
 
 %description
 Python 3.3+'s ipaddress for Python 2.6, 2.7, 3.2.
 
-%if 0%{?with_python2}
-%package -n         python2-ipaddress
-Summary:            Python2 package for python-ipaddress
-Provides:           python-ipaddress = %{version}-%{release}
-Obsoletes: 	    python-ipaddress < %{version}-%{release}
-
-%description -n     python2-ipaddress
-Python2 package for python-ipaddress
-%endif
-
-%if 0%{?with_python3}
 %package -n         python3-ipaddress
 Summary:            Python3 package for python-ipaddress
 
 %description -n     python3-ipaddress
 Python3 package for python-ipaddress
-%endif
 
 %prep
 %autosetup -n ipaddress-%{version} -p1
 
 %build
-%if 0%{?with_python2}
-%py2_build
-%endif
-
-%if 0%{?with_python3}
 %py3_build
-%endif
 
 %install
-%if 0%{?with_python2}
-%py2_install
-%endif
-
-%if 0%{?with_python3}
 %py3_install
-%endif
 
-%if 0%{?with_python2}
-%files -n python2-ipaddress
-%defattr(-,root,root)
-%doc README.md
-%license LICENSE
-%{python2_sitelib}/*
-%endif
-
-%if 0%{?with_python3}
 %files -n python3-ipaddress
 %defattr(-,root,root)
 %doc README.md
 %license LICENSE
 %{python3_sitelib}/*
-%endif
 
 %changelog
+* Thu Oct 29 2020 wangye <wangye70@huawei.com> - 1.0.23-2
+- remove python2-ipaddress subpackage
+
 * Mon Jul 20 2020 wangye <wangye70@huawei.com> - 1.0.23-1
 - Type:bugfix
 - Id:NA