remove references to Dev Environments feature

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

react-express-mongodb/.docker/docker-compose.yaml

@@ -1,42 +0,0 @@
-services:
-  frontend:
-    build:
-      context: frontend
-      target: dev-envs
-    ports:
-      - 3000:3000
-    stdin_open: true
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-    restart: always
-    networks:
-      - react-express
-    depends_on:
-      - backend
-
-  backend:
-    restart: always
-    build:
-      context: backend
-      target: dev-envs
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-    depends_on:
-      - mongo
-    networks:
-      - express-mongo
-      - react-express
-    expose: 
-      - 3000
-  mongo:
-    restart: always
-    image: mongo:4.2.0
-    volumes:
-      - ./data:/data/db
-    networks:
-      - express-mongo
-    expose:
-      - 27017
-networks:
-  react-express:
-  express-mongo:

react-express-mongodb/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/react-express-mongodb)
-
 ### React application with a NodeJS backend and a MongoDB database
 
 Project structure: