Update README.md

Author: webron

README.md

@@ -49,15 +49,6 @@ docker build -t swagger-ui-builder .
 docker run -v $PWD/dist:/build/dist swagger-ui-builder
 ```
 
-### Build using Docker
-
-To build swagger-ui using a docker container:
-
-```
-docker build -t swagger-ui-builder .
-docker run -v $PWD/dist:/build/dist swagger-ui-builder
-```
-
 ### Use
 Once you open the Swagger UI, it will load the [Swagger Petstore](http://petstore.swagger.wordnik.com/v2/swagger.json) service and show its APIs.  You can enter your own server url and click explore to view the API.