remove references to Dev Environments feature

Signed-off-by: Guillaume Lours <705411+glours@users.noreply.github.com>

nginx-golang/.docker/docker-compose.yaml

@@ -1,19 +0,0 @@
-services:
-  proxy:
-    image: nginx
-    volumes:
-      - type: bind
-        source: ./proxy/nginx.conf
-        target: /etc/nginx/conf.d/default.conf
-        read_only: true
-    ports:
-      - 80:80
-    depends_on:
-      - backend
-
-  backend:
-    build:
-      context: backend
-      target: dev-envs
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock

nginx-golang/README.md

@@ -1,11 +1,4 @@
 ## Compose sample application
-
-### Use with Docker Development Environments
-
-You can open this sample in the Dev Environments feature of Docker Desktop version 4.12 or later.
-
-[Open in Docker Dev Environments <img src="../open_in_new.svg" alt="Open in Docker Dev Environments" align="top"/>](https://open.docker.com/dashboard/dev-envs?url=https://github.com/docker/awesome-compose/tree/master/nginx-golang)
-
 ### NGINX proxy with Go backend
 
 Project structure: