DOCS-3466: Remove stream from hello world module guide (#3935)

Author: JessamyT

docs/operate/get-started/other-hardware/hello-world-module.md

@@ -577,7 +577,6 @@ First, implement the camera API methods by editing the camera class definition:
 1. Delete the `SubscribeRTP` and `Unsubscribe` methods, since they are not applicable to this camera.
 
 1. You can leave the rest of the functions not implemented, because this module is not meant to return a point cloud (`NextPointCloud`), and does not need to return multiple images simultaneously (`Images`).
-   If this camera returned a camera stream instead of a single static file, we would have implemented `Stream` instead of `Read`.
 
    However, you do need to edit the return statements to return empty structs that match the API.
    Edit these methods so they look like this:
@@ -587,10 +586,6 @@ First, implement the camera API methods by editing the camera class definition:
        return nil, errors.New("not implemented")
    }
 
-   func (s *helloWorldHelloCamera) Stream(ctx context.Context, errHandlers ...gostream.ErrorHandler) (gostream.VideoStream, error) {
-       return nil, errors.New("not implemented")
-   }
-
    func (s *helloWorldHelloCamera) Images(ctx context.Context) ([]camera.NamedImage, resource.ResponseMetadata, error) {
        return []camera.NamedImage{}, resource.ResponseMetadata{}, errors.New("not implemented")
    }