Remove workspace reference from on-push pipeline

Signed-off-by: Leonardo Milleri <lmilleri@redhat.com>

Author: lmilleri

.tekton/trustee-operator-bundle-push.yaml

@@ -393,9 +393,6 @@ spec:
         operator: in
         values:
         - "false"
-      workspaces:
-      - name: workspace
-        workspace: workspace
     - name: clamav-scan
       params:
       - name: image-digest
@@ -510,9 +507,6 @@ spec:
         operator: in
         values:
         - "false"
-      workspaces:
-      - name: workspace
-        workspace: workspace
     - name: sast-unicode-check
       params:
       - name: image-digest
@@ -539,9 +533,6 @@ spec:
         operator: in
         values:
         - "false"
-      workspaces:
-      - name: workspace
-        workspace: workspace
     - name: apply-tags
       params:
       - name: IMAGE_URL