Removed unused image file
Removed unused image file

This deletes the deployment_architecture_1.png file because it
isn't used in our documentation. It had been removed from the
documention because there were issues with it [1].

[1] https://bugs.launchpad.net/ironic/+bug/1353688

Change-Id: Ied85ab3786179df68ea42fc3720e1336a1b92c02

dims/ironic,pshchelo/ironic,Tan0/ironic,openstack/ironic,naototty/vagrant-lxc-ironic,pshchelo/ironic,redhat-openstack/ironic,NaohiroTamura/ironic,naterh/ironic,openstack/ironic,ionutbalutoiu/ironic,bacaldwell/ironic,NaohiroTamura/ironic,dims/ironic,SauloAislan/ironic,SauloAislan/ironic,rdo-management/ironic,naototty/vagrant-lxc-ironic,supermari0/ironic,ionutbalutoiu/ironic,bacaldwell/ironic,hpproliant/ironic,devananda/ironic