Update gitlab yml

Remove asset keyword.

.gitlab-ci.yml

@@ -136,8 +136,3 @@ release_job:
     description: 'Created by gitlab CI'
     tag_name: '$CI_COMMIT_TAG'
     ref: '$CI_COMMIT_TAG'
-  assets:
-    links:
-      - name: 'zip'
-        url: 'https://gitlab.gwdg.de/mpievolbio-scicomp/repinpop/download/rarefan-${CI_COMMIT_TAG}.zip'
-        filepath: rarefan.zip