Kernel packages for 3.18 only dropped (e1000e, open-vm-tools)

[Jan Rękorajski]

Time to say goodbye to two more kernel driver packages. Those were build
only for 3.18 kernel line.

Very old open-vm-tools is too broken to be fixed and new version does
not need all that cruft. e1000e has code paths unfixable for 32 bit arch
on 3.18.