meta: move inventory structure to be more usable

inventory/host_vars/matrix.finallycoffee.eu/postgresql.yml

@@ -2,7 +2,6 @@
 postgres_max_connections: 400
 postgres_shared_buffers: 3145728 # (3072 MiB)
 postgres_effective_cache_size: 8388608 # (8192 MiB)
-postgres_container_shm_size: 1G
 postgres_maintenance_work_mem: 786432 # (768 MiB)
 postgres_wal_buffers: 16384 # (16 MiB)
 postgres_random_page_cost: 1.3