comps: drop KDE from installation image

Fixes QubesOS/qubes-issues#2119

conf/comps-qubes.xml

@@ -1190,26 +1190,6 @@
     </packagelist>
   </group>
 
-  <environment>
-   <id>qubes-kde</id>
-   <display_order>2</display_order>
-   <name>Qubes OS with KDE</name>
-   <description>Standard installation with KDE enviroment in Dom0.</description>
-    <grouplist>
-     <groupid>base</groupid>
-     <groupid>base-x</groupid>
-     <groupid>hardware-support</groupid>
-     <groupid>fonts</groupid>
-     <groupid>sound-basic</groupid>
-     <groupid>qubes</groupid>
-     <groupid>kde-desktop-qubes</groupid>
-    </grouplist>
-    <optionlist>
-     <groupid default='true'>debian-8</groupid>
-     <groupid default='true'>whonix</groupid>
-    </optionlist>
-  </environment>
-
   <environment>
    <id>qubes-xfce</id>
    <display_order>3</display_order>
@@ -1231,28 +1211,6 @@
      <groupid default='true'>whonix</groupid>
     </optionlist>
   </environment>
-  <environment>
-   <id>qubes-kde-xfce</id>
-   <display_order>1</display_order>
-   <name>Qubes OS with KDE and Xfce</name>
-   <description>Standard installation with both KDE and Xfce enviroments in Dom0 (selectable on startup).</description>
-    <grouplist>
-     <groupid>base</groupid>
-     <groupid>base-x</groupid>
-     <groupid>hardware-support</groupid>
-     <groupid>fonts</groupid>
-     <groupid>sound-basic</groupid>
-     <groupid>qubes</groupid>
-     <groupid>xfce-desktop-qubes</groupid>
-     <groupid>xfce-extra-plugins</groupid>
-     <groupid>xfce-media</groupid>
-     <groupid>kde-desktop-qubes</groupid>
-    </grouplist>
-    <optionlist>
-     <groupid default='true'>debian-8</groupid>
-     <groupid default='true'>whonix</groupid>
-    </optionlist>
-  </environment>
   <langpacks>
     <match name="kdelibs" install="kde-l10n-%s"/>
   </langpacks>

conf/qubes-kickstart.cfg

@@ -13,7 +13,6 @@ repo --name=dom0-updates --baseurl=file:///tmp/qubes-installer/yum/dom0-updates/
 @core
 @base
 @base-x --nodefaults
-@kde-desktop-qubes
 @xfce-desktop-qubes
 @xfce-extra-plugins
 @xfce-media