Delete deprecated-base-image-check task

because there's no base image anyway and because the task isn't happy
due to architecture not being specified on the image.

```
step-check-images
WARNING: SBOM attachments are deprecated and support will be removed in a Cosign release soon after 2024-02-22 (see sigstore/cosign#2755). Instead, please use SBOM attestations.
WARNING: Downloading SBOMs this way does not ensure its authenticity. If you want to ensure a tamper-proof SBOM, download it using 'cosign download attestation <image uri>'.
Error: could not parse reference: quay.io/redhat-user-workloads/rh-acs-tenant/acs-konflux-tasks@
main.go:74: error during command execution: could not parse reference: quay.io/redhat-user-workloads/rh-acs-tenant/acs-konflux-tasks@
{"result":"ERROR","timestamp":"2024-12-11T19:23:19+00:00","note":"Unexpected error: Script errored at command: cosign download sbom $arch_imageanddigest > ${SBOM_FILE_PATH}.","namespace":"default","successes":0,"failures":0,"warnings":0}
```

.tekton/acs-konflux-tasks-push.yaml

@@ -289,26 +289,6 @@ spec:
         operator: in
         values: [ "true" ]
 
-    - name: deprecated-base-image-check
-      params:
-      - name: IMAGE_URL
-        value: $(tasks.build-image-index.results.IMAGE_URL)
-      - name: IMAGE_DIGEST
-        value: $(tasks.build-image-index.results.IMAGE_DIGEST)
-      taskRef:
-        params:
-        - name: name
-          value: deprecated-image-check
-        - name: bundle
-          value: quay.io/konflux-ci/tekton-catalog/task-deprecated-image-check:0.4@sha256:5a1a165fa02270f0a947d8a2131ee9d8be0b8e9d34123828c2bef589e504ee84
-        - name: kind
-          value: task
-        resolver: bundles
-      when:
-      - input: $(params.skip-checks)
-        operator: in
-        values: [ "false" ]
-
     - name: clair-scan
       params:
       - name: image-digest