readme: remove duplicated usage note

Author: johnstcn

README.md

@@ -32,10 +32,6 @@ For use with [Coder](https://github.com/coder/coder), see the [Dev Containers do
 go install
 ```
 
-## Using the provider
-
-Fill this in for each provider
-
 ## Developing the Provider
 
 If you wish to work on the provider, you'll first need [Go](http://www.golang.org) installed on your machine (see [Requirements](#requirements) above).