Remove obsolete Group tag

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

nodejs-underscore.spec

@@ -15,7 +15,6 @@ Version:    1.9.1
 Release:    2%{?dist}
 Summary:    JavaScript's functional programming helper library
 License:    MIT
-Group:      System Environment/Libraries
 URL:        http://underscorejs.org/
 Source0:    http://registry.npmjs.org/underscore/-/underscore-%{version}.tgz
 # The test files are not included in the npm tarball.
@@ -49,7 +48,6 @@ extending any core JavaScript objects.
 
 %package -n js-underscore
 Summary:    JavaScript's functional programming helper library
-Group:      System Environment/Libraries
 %if 0%{?fedora}
 Requires:   web-assets-filesystem
 %endif