Documentation: virt: kvm/api: drop doubled words

Drop multiple doubled words.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Link: https://lore.kernel.org/r/20200703212906.30655-3-rdunlap@infradead.org


Signed-off-by: Jonathan Corbet <corbet@lwn.net>