Remove obsolete Group tag

References: https://fedoraproject.org/wiki/Changes/Remove_Group_Tag

apache-commons-math.spec

@@ -4,7 +4,6 @@ Name:             apache-commons-math
 Version:          3.4.1
 Release:          9%{?dist}
 Summary:          Java library of lightweight mathematics and statistics components
-Group:            Development/Libraries
 License:          ASL 1.1 and ASL 2.0 and BSD
 URL:              http://commons.apache.org/math/
 Source0:          http://www.apache.org/dist/commons/math/source/%{short_name}-%{version}-src.tar.gz
@@ -28,7 +27,6 @@ Java programming language or Commons Lang.
 
 %package javadoc
 Summary:          Javadoc for %{name}
-Group:            Documentation
 
 %description javadoc
 This package contains the API documentation for %{name}.