[misc] cleanup unused dependency on mongo and redis

docker-compose.ci.yml

@@ -27,11 +27,6 @@ services:
       MOCHA_GREP: ${MOCHA_GREP}
       NODE_ENV: test
       TEXLIVE_IMAGE:
-    depends_on:
-      mongo:
-        condition: service_healthy
-      redis:
-        condition: service_healthy
     command: npm run test:acceptance:_run
 
 
@@ -42,8 +37,3 @@ services:
       - ./:/tmp/build/
     command: tar -czf /tmp/build/build.tar.gz --exclude=build.tar.gz --exclude-vcs .
     user: root
-  redis:
-    image: redis
-
-  mongo:
-    image: mongo:3.6