Remove polylith/API mode (#2967)

This removes most of the code used for polylith/API mode.

This removes the `/api` internal endpoints entirely. 

Binary size change roughly 5%: 
```
51437560 Feb 13 10:15 dendrite-monolith-server # old
48759008 Feb 13 10:15 dendrite-monolith-server # new
```

5 files changed, 1 insertions, 160 deletions

diff --git a/build/docker/README.md b/build/docker/README.md
index 7eb20d88..d8abd653 100644
--- a/build/docker/README.md
+++ b/build/docker/README.md
@@ -5,7 +5,6 @@ These are Docker images for Dendrite!
 They can be found on Docker Hub:
 
 - [matrixdotorg/dendrite-monolith](https://hub.docker.com/r/matrixdotorg/dendrite-monolith) for monolith deployments
-- [matrixdotorg/dendrite-polylith](https://hub.docker.com/r/matrixdotorg/dendrite-polylith) for polylith deployments
 
 ## Dockerfiles
 
@@ -15,7 +14,6 @@ repository, run:
 
 ```
 docker build . --target monolith -t matrixdotorg/dendrite-monolith
-docker build . --target polylith -t matrixdotorg/dendrite-monolith
 docker build . --target demo-pinecone -t matrixdotorg/dendrite-demo-pinecone
 docker build . --target demo-yggdrasil -t matrixdotorg/dendrite-demo-yggdrasil
 ```
@@ -25,7 +23,6 @@ docker build . --target demo-yggdrasil -t matrixdotorg/dendrite-demo-yggdrasil
 There are two sample `docker-compose` files:
 
 - `docker-compose.monolith.yml` which runs a monolith Dendrite deployment
-- `docker-compose.polylith.yml` which runs a polylith Dendrite deployment
 
 ## Configuration
 
@@ -51,7 +48,7 @@ docker run --rm --entrypoint="" \
 
 The key files will now exist in your current working directory, and can be mounted into place.
 
-## Starting Dendrite as a monolith deployment
+## Starting Dendrite
 
 Create your config based on the [`dendrite-sample.monolith.yaml`](https://github.com/matrix-org/dendrite/blob/main/dendrite-sample.monolith.yaml) sample configuration file.
 
@@ -61,16 +58,6 @@ Then start the deployment:
 docker-compose -f docker-compose.monolith.yml up
 ```
 
-## Starting Dendrite as a polylith deployment
-
-Create your config based on the [`dendrite-sample.polylith.yaml`](https://github.com/matrix-org/dendrite/blob/main/dendrite-sample.polylith.yaml) sample configuration file.
-
-Then start the deployment:
-
-```
-docker-compose -f docker-compose.polylith.yml up
-```
-
 ## Building the images
 
 The `build/docker/images-build.sh` script will build the base image, followed by
diff --git a/build/docker/docker-compose.polylith.yml b/build/docker/docker-compose.polylith.yml
deleted file mode 100644
index de0ab0aa..00000000
--- a/build/docker/docker-compose.polylith.yml
+++ /dev/null
@@ -1,143 +0,0 @@
-version: "3.4"
-services:
-  postgres:
-    hostname: postgres
-    image: postgres:14
-    restart: always
-    volumes:
-      - ./postgres/create_db.sh:/docker-entrypoint-initdb.d/20-create_db.sh
-      # To persist your PostgreSQL databases outside of the Docker image, 
-      # to prevent data loss, modify the following ./path_to path:
-      - ./path_to/postgresql:/var/lib/postgresql/data
-    environment:
-      POSTGRES_PASSWORD: itsasecret
-      POSTGRES_USER: dendrite
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U dendrite"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-    networks:
-      - internal
-
-  jetstream:
-    hostname: jetstream
-    image: nats:latest
-    command: |
-      --jetstream
-      --store_dir /var/lib/nats
-      --cluster_name Dendrite
-    volumes:
-      # To persist your NATS JetStream streams outside of the Docker image,
-      # prevent data loss, modify the following ./path_to path:
-      - ./path_to/nats:/var/lib/nats
-    networks:
-      - internal
-
-  client_api:
-    hostname: client_api
-    image: matrixdotorg/dendrite-polylith:latest
-    command: clientapi
-    volumes:
-      - ./config:/etc/dendrite
-    depends_on:
-      - jetstream
-      - postgres
-    networks:
-      - internal
-    restart: unless-stopped
-
-  media_api:
-    hostname: media_api
-    image: matrixdotorg/dendrite-polylith:latest
-    command: mediaapi
-    volumes:
-      - ./config:/etc/dendrite
-      - ./media:/var/dendrite/media
-    networks:
-      - internal
-    restart: unless-stopped
-
-  sync_api:
-    hostname: sync_api
-    image: matrixdotorg/dendrite-polylith:latest
-    command: syncapi
-    volumes:
-      - ./config:/etc/dendrite
-    depends_on:
-      - jetstream
-      - postgres
-    networks:
-      - internal
-    restart: unless-stopped
-
-  room_server:
-    hostname: room_server
-    image: matrixdotorg/dendrite-polylith:latest
-    command: roomserver
-    volumes:
-      - ./config:/etc/dendrite
-    depends_on:
-      - jetstream
-      - postgres
-    networks:
-      - internal
-    restart: unless-stopped
-
-  federation_api:
-    hostname: federation_api
-    image: matrixdotorg/dendrite-polylith:latest
-    command: federationapi
-    volumes:
-      - ./config:/etc/dendrite
-    depends_on:
-      - jetstream
-      - postgres
-    networks:
-      - internal
-    restart: unless-stopped
-      
-  key_server:
-    hostname: key_server
-    image: matrixdotorg/dendrite-polylith:latest
-    command: keyserver
-    volumes:
-      - ./config:/etc/dendrite
-    depends_on:
-      - jetstream
-      - postgres
-    networks:
-      - internal
-    restart: unless-stopped
-      
-  user_api:
-    hostname: user_api
-    image: matrixdotorg/dendrite-polylith:latest
-    command: userapi
-    volumes:
-      - ./config:/etc/dendrite
-    depends_on:
-      - jetstream
-      - postgres
-    networks:
-      - internal
-    restart: unless-stopped
-
-  appservice_api:
-    hostname: appservice_api
-    image: matrixdotorg/dendrite-polylith:latest
-    command: appservice
-    volumes:
-      - ./config:/etc/dendrite
-    networks:
-      - internal
-    depends_on:
-      - jetstream
-      - postgres
-      - room_server
-      - user_api
-    restart: unless-stopped
-
-networks:
-  internal:
-    attachable: true
diff --git a/build/docker/images-build.sh b/build/docker/images-build.sh
index d97a701e..bf227968 100755
--- a/build/docker/images-build.sh
+++ b/build/docker/images-build.sh
@@ -7,6 +7,5 @@ TAG=${1:-latest}
 echo "Building tag '${TAG}'"
 
 docker build . --target monolith -t matrixdotorg/dendrite-monolith:${TAG}
-docker build . --target polylith -t matrixdotorg/dendrite-monolith:${TAG}
 docker build . --target demo-pinecone -t matrixdotorg/dendrite-demo-pinecone:${TAG}
 docker build . --target demo-yggdrasil -t matrixdotorg/dendrite-demo-yggdrasil:${TAG}
\ No newline at end of file
diff --git a/build/docker/images-pull.sh b/build/docker/images-pull.sh
index f3f98ce7..7772ca74 100755
--- a/build/docker/images-pull.sh
+++ b/build/docker/images-pull.sh
@@ -5,4 +5,3 @@ TAG=${1:-latest}
 echo "Pulling tag '${TAG}'"
 
 docker pull matrixdotorg/dendrite-monolith:${TAG}
-docker pull matrixdotorg/dendrite-polylith:${TAG}
\ No newline at end of file
diff --git a/build/docker/images-push.sh b/build/docker/images-push.sh
index 248fdee2..d166d355 100755
--- a/build/docker/images-push.sh
+++ b/build/docker/images-push.sh
@@ -5,4 +5,3 @@ TAG=${1:-latest}
 echo "Pushing tag '${TAG}'"
 
 docker push matrixdotorg/dendrite-monolith:${TAG}
-docker push matrixdotorg/dendrite-polylith:${TAG}
\ No newline at end of file