remove 8.future from releases

Author: jsvd

.travis.yml

@@ -8,7 +8,6 @@ jobs:
     - env: INTEGRATION=true SNAPSHOT=true LOG_LEVEL=info ELASTIC_STACK_VERSION=8.previous
     - env: INTEGRATION=true SNAPSHOT=true LOG_LEVEL=info ELASTIC_STACK_VERSION=8.current
     - env: INTEGRATION=true SNAPSHOT=true LOG_LEVEL=info ELASTIC_STACK_VERSION=8.next
-    - env: INTEGRATION=true SNAPSHOT=true LOG_LEVEL=info ELASTIC_STACK_VERSION=8.future
     - env: INTEGRATION=true SNAPSHOT=true LOG_LEVEL=info ELASTIC_STACK_VERSION=main
     - stage: "Secure Integration Tests"
       env: SECURE_INTEGRATION=true INTEGRATION=true LOG_LEVEL=info ELASTIC_STACK_VERSION=8.current SNAPSHOT=true