build(rultor): remove publish command from script

Author: rafamizes

.rultor.yml

@@ -24,9 +24,6 @@ release:
   script: |-
     sed -i "s/^\(version:\).*/\1 $tag/" pubspec.yaml
     sed -i "/\[[Uu]nreleased\]/a\\\n## [$tag] - $(date '+%F')" CHANGELOG.md
-    mkdir -p ~/.pub-cache
-    mv ../credentials.json ~/.pub-cache/credentials.json
-    flutter pub publish -f
     git commit -am "version $tag"
     git checkout master
     git merge __rultor