remove explicit addition of variable group...

eng/pipelines/fluent_java_mgmt_docs.yml

@@ -1,7 +1,4 @@
 trigger: none #this is not a CI, the pipeline will be triggered manually
-
-variables: 
-- group: 'GitHub Release Variables' 
   
 jobs:
   - job: 'Publish_API_docs_for_the_fluent_management_java_SDK'