Revert "KVM: doc: Document the life cycle of a VM and its resources"

This reverts commit 919f6cd8.

The patch was applied twice.
The first commit is eca6be56.

Reported-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>