comps: drop qubes-dom0-debug group

Save some space on installation DVD.

conf/comps-qubes.xml

@@ -1112,22 +1112,6 @@
     </packagelist>
   </group>
 
-  <group>
-    <id>qubes-dom0-debug</id>
-    <name>Qubes dom0 debug tools (for developers only)</name>
-    <default>false</default>
-    <uservisible>true</uservisible>
-    <packagelist>
-      <packagereq>strace</packagereq>
-      <packagereq>gdb</packagereq>
-      <packagereq>xen-debuginfo</packagereq>
-      <packagereq>xdotool</packagereq>
-      <packagereq>qubes-core-dom0-debuginfo</packagereq>
-      <packagereq>qubes-core-dom0-linux-debuginfo</packagereq>
-      <packagereq>qubes-gui-dom0-debuginfo</packagereq>
-    </packagelist>
-  </group>
-
   <group>
     <id>debian-8</id>
     <name>Debian 8 (jessie) template</name>

conf/qubes-kickstart.cfg

@@ -22,7 +22,6 @@ repo --name=dom0-updates --baseurl=file:///tmp/qubes-installer/yum/dom0-updates/
 @hardware-support
 @qubes
 @anaconda-tools
-@qubes-dom0-debug
 @debian-8
 @whonix
 %end