lorax-templates-qubes: use only explicit kernel-qubes-vm packages

Don't include all kernel-qubes-vm packages from qubes-dom0 repo, only
those explicitly placed in dom0-updates repo.
Also, do not include a copy of the newest one.

lorax-templates-qubes/templates/x86.tmpl

@@ -35,16 +35,18 @@ install ${configdir}/grub.conf ${BOOTDIR}
 install usr/share/anaconda/boot/syslinux-splash.png ${BOOTDIR}/splash.png
 install boot/memtest* ${BOOTDIR}/memtest
 
-mkdir ${EXTRAKERNELS}
-# bypass "chroot" enforced by Lorax parser
--install ../../../../yum/qubes-dom0/rpm/kernel-qubes-vm-[0-9]*rpm ${EXTRAKERNELS}
-
 ## install kernels
 mkdir ${KERNELDIR}
 <%
 sortedkernels = sorted(kernels, key=lambda k: LooseVersion(k['version']))
+latestkernel = sortedkernels[-1]
 %>
 
+mkdir ${EXTRAKERNELS}
+# bypass "chroot" enforced by Lorax parser
+-install ../../../../yum/dom0-updates/rpm/kernel-qubes-vm-[0-9]*rpm ${EXTRAKERNELS}
+-remove ${EXTRAKERNELS}/kernel-qubes-vm-${latestkernel.version}.rpm
+
 %for kernel in sortedkernels:
     # Use short kernel version because of ISO9660 filename length limitation
     <%