Remove sgabios.bin workaround

The bug has been fixed since a while, also in recent distributions,
for example Ubuntu 20.04, the sgabios.bin ROM is provided directly
by qemu-system-data as an actual file under /usr/share/qemu and
it conflicts with the one provided by sgabios, so removing the
workaround is actually needed to prevent failures.

Change-Id: Ib5f23dbd8839a0927418692054f4ed4abd76babc

Author: elfosardo

lib/nova_plugins/hypervisor-ironic

@@ -68,13 +68,6 @@ function install_nova_hypervisor {
         return
     fi
     install_libvirt
-    if [[ "$IRONIC_VM_LOG_CONSOLE" == "True" ]] && is_ubuntu; then
-        # Ubuntu packaging+apparmor issue prevents libvirt from loading
-        # the ROM from /usr/share/misc.  Workaround by installing it directly
-        # to a directory that it can read from. (LP: #1393548)
-        sudo rm -rf /usr/share/qemu/sgabios.bin
-        sudo cp /usr/share/misc/sgabios.bin /usr/share/qemu/sgabios.bin
-    fi
 }
 
 # start_nova_hypervisor - Start any required external services