Remove obsolete Group tag

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

GraphicsMagick.spec

@@ -88,7 +88,6 @@ of the software.
 
 %package devel
 Summary: Libraries and header files for GraphicsMagick app development
-Group: Development/Libraries
 Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
@@ -103,7 +102,6 @@ however.
 
 %package doc
 Summary: GraphicsMagick documentation
-Group: Documentation
 # upgrade path for introduction of -doc subpkg in 1.3.19-4
 Obsoletes: GraphicsMagick < 1.3.19-4
 %{!?el5:BuildArch: noarch}
@@ -113,7 +111,6 @@ Documentation for GraphicsMagick.
 
 %package perl
 Summary: GraphicsMagick perl bindings
-Group: System Environment/Libraries
 Requires: %{name}%{?_isa} = %{version}-%{release}
 Requires: perl(:MODULE_COMPAT_%(eval "`%{__perl} -V:version`"; echo $version))
 
@@ -125,7 +122,6 @@ GraphicsMagick.
 
 %package c++
 Summary: GraphicsMagick Magick++ library (C++ bindings)
-Group: System Environment/Libraries
 Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description c++
@@ -137,7 +133,6 @@ GraphicsMagick++.
 
 %package c++-devel
 Summary: C++ bindings for the GraphicsMagick library
-Group: Development/Libraries
 Requires: %{name}-c++%{?_isa} = %{version}-%{release}
 Requires: %{name}-devel%{?_isa} = %{version}-%{release}