tests: remove orphan vfio.yaml k8s workload manifest

This manifest is not referenced by any .bats test file and
is effectively dead code.

Made-with: Cursor
Signed-off-by: Fabiano Fidêncio <ffidencio@nvidia.com>

tests/integration/kubernetes/runtimeclass_workloads/vfio.yaml

@@ -1,23 +0,0 @@
-#
-# Copyright (c) 2020 Intel Corporation
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-apiVersion: v1
-kind: Pod
-metadata:
-  name: vfio
-spec:
-  runtimeClassName: kata
-  containers:
-  - name: c1
-    image: quay.io/prometheus/busybox:latest
-    command:
-      - sh
-    tty: true
-    stdin: true
-    resources:
-      limits:
-        intel.com/virtio_net: "1"
-      requests:
-        intel.com/virtio_net: "1"