Fix a redundant obsolete dependency in spec

Signed-off-by: tangyuchen <tangyuchen5@huawei.com>

attr.spec

@@ -1,7 +1,7 @@
 %{!?_licensedir:%global license %%doc}
 Name:    attr
 Version: 2.5.1
-Release: 3
+Release: 4
 Summary: Commands for Manipulating Filesystem Extended Attributes
 License: GPLv2+ AND LGPLv2+
 URL:     https://savannah.nongnu.org/projects/attr
@@ -27,7 +27,6 @@ with the SGI IRIX tool of the same name.
 %package -n libattr-devel
 License: LGPLv2+
 Summary: Header files for libattr
-Obsoletes: libattr
 Requires: glibc-headers
 
 %description -n libattr-devel
@@ -97,6 +96,9 @@ fi
 %{_mandir}/man3/*
 
 %changelog
+* Mon Dec 26 2022 tangyuchen <tangyuchen5@huawei.com> - 2.5.1-4
+- fix redundant spec code
+
 * Sat Oct 29 2022 wangzhiqiang <wangzhiqiang95@huawei.com> - 2.5.1-3
 - fix compile warning