Don't set group tags

They are unused in Fedora.

mingw-libjpeg-turbo.spec

@@ -11,7 +11,6 @@ Summary:        MinGW Windows Libjpeg-turbo library
 
 License:        wxWidgets
 URL:            http://libjpeg-turbo.virtualgl.org/
-Group:          Development/Libraries
 Source0:        http://downloads.sourceforge.net/libjpeg-turbo/libjpeg-turbo-%{version}.tar.gz
 
 # Make jconfig.h more autoconf friendly
@@ -155,6 +154,7 @@ chmod -x README.md
 * Fri Sep 16 2016 Kalev Lember <klember@redhat.com> - 1.5.0-1
 - Update to 1.5.0
 - Include license files
+- Don't set group tags
 
 * Tue May 10 2016 Kalev Lember <klember@redhat.com> - 1.4.2-1
 - Update to 1.4.2