Remove obsolete Group tag

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

openbabel.spec

@@ -12,7 +12,6 @@ Version: 2.4.1
 Release: 19%{?dist}
 Summary: Chemistry software file format converter
 License: GPLv2
-Group: Applications/File
 URL: https://openbabel.org/
 Source0: https://github.com/openbabel/openbabel/archive/openbabel-%(echo %{version} | tr '.' '-').tar.gz
 Source1: obgui.desktop
@@ -61,7 +60,6 @@ software.
 
 %package devel
 Summary: Development tools for programs which will use the Open Babel library
-Group: Development/Libraries
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Requires: pkgconfig
 
@@ -71,7 +69,6 @@ necessary for developing programs using the Open Babel library.
 
 %package doc
 Summary: Additional documentation for the Open Babel library
-Group: Documentation
 BuildArch: noarch
 
 %description doc
@@ -79,7 +76,6 @@ This package contains additional documentation for Open Babel.
 
 %package gui
 Summary: Chemistry software file format converter - GUI version
-Group: Applications/File
 
 %description gui
 Open Babel is a free, open-source version of the Babel chemistry file
@@ -92,7 +88,6 @@ This package contains the graphical interface.
 
 %package libs
 Summary: Chemistry software file format converter - libraries
-Group: System Environment/Libraries
 
 %description libs
 Open Babel is a free, open-source version of the Babel chemistry file
@@ -105,7 +100,6 @@ This package contains the C++ library, which includes all of the
 file-translation code.
 
 %package -n perl-%{name}
-Group: System Environment/Libraries
 Summary: Perl wrapper for the Open Babel library
 Requires: perl(:MODULE_COMPAT_%(eval "`%{__perl} -V:version`"; echo $version))
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
@@ -116,7 +110,6 @@ BuildRequires: perl-generators
 Perl wrapper for the Open Babel library.
 
 %package -n python2-%{name}
-Group: System Environment/Libraries
 Summary: Python wrapper for the Open Babel library
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 BuildRequires: python2-devel
@@ -126,7 +119,6 @@ BuildRequires: python2-devel
 Python2 wrapper for the Open Babel library.
 
 %package -n python3-%{name}
-Group: System Environment/Libraries
 Summary: Python wrapper for the Open Babel library
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 BuildRequires: python3-devel
@@ -137,7 +129,6 @@ Python3 wrapper for the Open Babel library.
 
 %package -n ruby-%{name}
 Summary: Ruby wrapper for the Open Babel library
-Group: Development/Libraries
 Requires: ruby(release)
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 BuildRequires: ruby-devel