remove broken examples

examples/stream/subscribe/subscribeToATopic.go

@@ -1,17 +0,0 @@
-package example
-
-import (
-	"fmt"
-	"os"
-
-	"go.m3o.com/stream"
-)
-
-// Subscribe to messages for a given topic.
-func SubscribeToAtopic() {
-	streamService := stream.NewStreamService(os.Getenv("M3O_API_TOKEN"))
-	rsp, err := streamService.Subscribe(&stream.SubscribeRequest{
-		Topic: "events",
-	})
-	fmt.Println(rsp, err)
-}