Revert "Merge pull request #72 from Kukks/feature/mysql"

This reverts commit a187899945, reversing
changes made to d7241f0d0f.

docker-compose-generator/docker-fragments/postgres.yml

@@ -6,11 +6,6 @@ services:
     image:  postgres:9.6.5
     volumes:
       - "postgres_datadir:/var/lib/postgresql/data"
-  btcpayserver:
-    environment:
-      BTCPAY_POSTGRES: User ID=postgres;Host=postgres;Port=5432;Database=btcpayserver${NBITCOIN_NETWORK:-regtest}
-    links:
-      - postgres
 
 volumes:
     postgres_datadir: