Fix workflow

.github/workflows/dockerpublish.yml

@@ -14,7 +14,6 @@ on:
   pull_request:
 
 env:
-  # TODO: Change variable to your image's name.
   IMAGE_NAME: terasology
 
 jobs:
@@ -76,7 +75,6 @@ jobs:
 
           if [ " ${TERASOLOGY_PROPERTIES_URL}" == " " ]; then
               if [ " ${TERASOLOGY_BUILD}" == " " ]; then
-                  source .env
                   TERASOLOGY_PROPERTIES_URL=http://jenkins.terasology.org/job/TerasologyStable/lastSuccessfulBuild/artifact/build/resources/main/org/terasology/version/versionInfo.properties
               else
                   if [ " ${TERASOLOGY_BUILD}" == " unstable" ]; then