Revert "Build website twice to account for out-of-sync translations"

This causes build errors (file overwrite check).

This reverts commit 5dd0577d.

.gitlab-ci.yml

@@ -10,7 +10,7 @@ pages:
   - apt-get -y update && apt-get -y install po4a
   - pip install -r requirements.txt
   script:
-  - make publish; make publish
+  - make publish
   - cp _redirects public/
   artifacts:
     paths: