Remove obsolete Group tag

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

CUnit.spec

@@ -5,7 +5,6 @@ Version:        2.1.3
 Release:        18%{?dist}
 Summary:        Unit testing framework for C
 
-Group:          System Environment/Libraries
 License:        LGPLv2+
 URL:            http://cunit.sourceforge.net/
 Source0:        http://downloads.sourceforge.net/cunit/%{name}-%{tarver}.tar.bz2
@@ -20,7 +19,6 @@ testing functionality with a flexible variety of user interfaces.
 
 %package devel
 Summary:        Header files and libraries for CUnit development
-Group:          Development/Libraries
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 
 %description devel