drop obsolete Group tag

liblangtag.spec

@@ -6,7 +6,6 @@ Version: 0.5.4
 Release: 4%{?dist}
 Summary: An interface library to access tags for identifying languages
 
-Group: System Environment/Libraries
 License: (LGPLv3+ or MPLv2.0) and UCD
 URL: http://tagoh.bitbucket.org/liblangtag/
 Source0: https://bitbucket.org/tagoh/%{name}/downloads/%{name}-%{version}.tar.bz2
@@ -40,7 +39,6 @@ Features:
 
 %package devel
 Summary: Development files for %{name}
-Group: Development/Libraries
 Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
@@ -49,7 +47,6 @@ developing applications that use %{name}.
 
 %package doc
 Summary: Documentation of %{name} API
-Group: Documentation
 BuildArch: noarch
 
 %description doc