Stop performing a version existence check

registry.cern.ch/monit has been configured so all tags are immutable
hence this is not necessary anymore.

.gitlab-ci.yml

@@ -63,34 +63,8 @@ unittest:
   script:
     - helm unittest -f 'tests/**/*.yaml' .
 
-version_test:
-  stage: test
-  rules:
-    - if: '$CI_COMMIT_TAG'
-  script: |
-    # Installing helm...
-    dnf install -y diffutils wget tar
-    wget https://get.helm.sh/helm-v3.15.3-linux-386.tar.gz
-    tar -zxvf helm-v3.15.3-linux-386.tar.gz
-    mv linux-386/helm /usr/local/bin/helm
-    rm helm-v3.15.3-linux-386.tar.gz
-    rm -rf linux-386
-
-    # Check if the tag already exists in harbor to avoid overrides.
-    if helm pull oci://registry.cern.ch/monit/cern-it-monitoring-kubernetes --version $CI_COMMIT_TAG; then
-      # Command was successful (exit code 0), so the tag exists
-      echo "The tag $TAG already exists in harbor. Please update it."
-      exit 1  # Exit with non-zero status to indicate tag exists
-    else
-      # Command failed (non-zero exit code), so the tag does not exist
-      echo "The tag $TAG does not exist in harbor. All ok..."
-      exit 0  # Exit with 0 status
-    fi
-
 helm_deploy:
   stage: deploy
-  needs:
-    - version_test
   rules:
     - if: '$CI_COMMIT_TAG'
   script: |