Remove obsolete Group tag

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

polkit.spec

@@ -11,7 +11,6 @@ License: LGPLv2+
 URL: http://www.freedesktop.org/wiki/Software/polkit
 Source0: http://www.freedesktop.org/software/polkit/releases/%{name}-%{version}.tar.gz
 Source1: http://www.freedesktop.org/software/polkit/releases/%{name}-%{version}.tar.gz.sign
-Group: System Environment/Libraries
 
 Patch1: polkitagentlistener-freed-server-returned.patch
 Patch2: pkttyagent-rescue-target-error-msg.patch
@@ -68,7 +67,6 @@ processes.
 
 %package devel
 Summary: Development files for polkit
-Group: Development/Libraries
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Requires: %name-docs = %{version}-%{release}
 Requires: glib2-devel
@@ -80,7 +78,6 @@ Development files for polkit.
 
 %package docs
 Summary: Development documentation for polkit
-Group: Development/Libraries
 Requires: %name-devel = %{version}-%{release}
 Obsoletes: PolicyKit-docs <= 0.10
 Provides: PolicyKit-docs = 0.11
@@ -91,7 +88,6 @@ Development documentation for polkit.
 
 %package libs
 Summary: Libraries for polkit
-Group: Development/Libraries
 
 %description libs
 Libraries files for polkit.