rm memory limits for staging docker compose

docker-compose-staging.yaml

···
       CASSANDRA_RACK: 'rack1'
       CASSANDRA_ENDPOINT_SNITCH: 'GossipingPropertyFileSnitch'
       CASSANDRA_NUM_TOKENS: 256
-      # Reduce memory usage for local development
-      MAX_HEAP_SIZE: '512M'
-      HEAP_NEWSIZE: '128M'
-      # Override JVM opts to limit direct memory to fit in container
-      JVM_OPTS: '-Xms512M -Xmx512M -XX:MaxDirectMemorySize=256M'
     volumes:
       - cassandra-data:/var/lib/cassandra
-    # Limit container memory (increased to accommodate heap + direct memory + overhead)
-    mem_limit: 2g
-    memswap_limit: 2g
-    # Disable swap for better performance
-    mem_swappiness: 0
-    # Allow memory locking (reduces warnings)
-    ulimits:
-      memlock: -1
-      nofile:
-        soft: 65536
-        hard: 65536
     healthcheck:
       test: ["CMD-SHELL", "cqlsh -e 'describe cluster'"]
       interval: 30s