Remove obsolete Group tag

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

double-conversion.spec

@@ -5,7 +5,6 @@ Name:           double-conversion
 Version:        3.0.0
 Release:        3%{?dist}
 License:        BSD
-Group:          Development/Libraries
 Source0:        https://github.com/google/double-conversion/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz
 URL:            https://github.com/google/double-conversion
 BuildRequires:  gcc
@@ -20,7 +19,6 @@ and improved so that it can be used more easily in other projects.
 
 %package devel
 Summary:    Library providing binary-decimal and decimal-binary routines for IEEE doubles
-Group:      Development/Libraries
 Requires:   %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
@@ -32,7 +30,6 @@ examples can be found in test/cctest/test-conversions.cc.
 
 %package static
 Summary:    Library providing binary-decimal and decimal-binary routines for IEEE doubles
-Group:      Development/Libraries
 Requires:   %{name}-devel%{?_isa} = %{version}-%{release}
 
 %description static