tests: Remove redundant aarch64 tests

My commit 7b9de914 added some aarch64 CPU test cases. I wanted to test
two different code paths but inadvertently added two of the same test
cases.

The second code path (using <cpu><model>host</model</cpu>) isn't easily
exercised via the qemu tests anyways, I'll need to look elsewhere.

Regardless, remove the redundant tests for now

tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
-/usr/bin/qemu-system-aarch64 -S -M virt -cpu host -m 1024 -smp 1 -nographic \
--nodefconfig -nodefaults -monitor unix:/tmp/test-monitor,server,nowait \
--boot c -usb -drive file=/aarch64.raw,if=none,id=drive-virtio-disk0 \
--device virtio-blk-device,drive=drive-virtio-disk0,id=virtio-disk0

tests/qemuxml2argvdata/qemuxml2argv-aarch64-cpu-model-host.xml

-<domain type='kvm'>
-  <name>aarch64test</name>
-  <uuid>496d7ea8-9739-544b-4ebd-ef08be936e8b</uuid>
-  <memory unit='KiB'>1048576</memory>
-  <currentMemory unit='KiB'>1048576</currentMemory>
-  <vcpu placement='static'>1</vcpu>
-  <os>
-    <type arch='aarch64' machine='virt'>hvm</type>
-    <boot dev='hd'/>
-  </os>
-  <features>
-    <acpi/>
-    <apic/>
-    <pae/>
-  </features>
-  <cpu mode='host-passthrough'/>
-  <clock offset='utc'/>
-  <on_poweroff>destroy</on_poweroff>
-  <on_reboot>restart</on_reboot>
-  <on_crash>restart</on_crash>
-  <devices>
-    <emulator>/usr/bin/qemu-system-aarch64</emulator>
-    <disk type='file' device='disk'>
-      <source file='/aarch64.raw'/>
-      <target dev='vda' bus='virtio'/>
-    </disk>
-  </devices>
-</domain>

tests/qemuxml2argvtest.c

@@ -1538,9 +1538,6 @@ mymain(void)
     DO_TEST("aarch64-cpu-passthrough", QEMU_CAPS_DEVICE, QEMU_CAPS_DRIVE,
             QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DEVICE_VIRTIO_MMIO,
             QEMU_CAPS_CPU_HOST, QEMU_CAPS_KVM);
-    DO_TEST("aarch64-cpu-model-host", QEMU_CAPS_DEVICE, QEMU_CAPS_DRIVE,
-            QEMU_CAPS_NODEFCONFIG, QEMU_CAPS_DEVICE_VIRTIO_MMIO,
-            QEMU_CAPS_CPU_HOST, QEMU_CAPS_KVM);
     DO_TEST("aarch64-gic", QEMU_CAPS_DEVICE, QEMU_CAPS_DRIVE,
             QEMU_CAPS_KVM);
 

tests/qemuxml2xmloutdata/qemuxml2argv-aarch64-cpu-passthrough.xml

-<domain type="kvm">
-  <name>aarch64test</name>
-  <uuid>496d7ea8-9739-544b-4ebd-ef08be936e8b</uuid>
-  <memory>1048576</memory>
-  <currentMemory>1048576</currentMemory>
-  <vcpu placement='static'>1</vcpu>
-  <os>
-    <type arch="aarch64" machine="virt">hvm</type>
-  </os>
-  <features>
-    <acpi/>
-    <apic/>
-    <pae/>
-  </features>
-  <cpu mode='host-passthrough'/>
-  <clock offset="utc"/>
-  <on_poweroff>destroy</on_poweroff>
-  <on_reboot>restart</on_reboot>
-  <on_crash>restart</on_crash>
-  <devices>
-    <emulator>/usr/bin/qemu-system-aarch64</emulator>
-    <disk type='file' device='disk'>
-      <source file='/aarch64.raw'/>
-      <target dev='vda' bus='virtio'/>
-    </disk>
-  </devices>
-</domain>

tests/qemuxml2xmltest.c

@@ -614,8 +614,6 @@ mymain(void)
     DO_TEST("memory-hotplug-nonuma");
     DO_TEST("memory-hotplug-dimm");
 
-    DO_TEST("aarch64-cpu-model-host");
-
     virObjectUnref(driver.caps);
     virObjectUnref(driver.xmlopt);