Move samples to the doc repo (#1360)

* Hide finder indexes

* Remove samples from serving

* Add back the helloworld sample

* Link to docs repo

* Move build-pack samples

* Clean up merge

* Remove helloworld again

.gitignore

@@ -1,3 +1,4 @@
 bazel-*
 .idea
 .vscode/
+.DS_Store

sample/README.md

@@ -1,30 +1,4 @@
-# Samples
+# Serving Samples
 
-This directory contains sample services which demonstrate `Knative Serving`
-functionality.
-
-## Prerequisites
-
-[Install Knative Serving](https://github.com/knative/install/blob/master/README.md)
-
-## Samples
-
-* [helloworld](./helloworld) - A simple webserver written in Go
-* [pythonsimple](./pythonsimple) - A simple webserver written in Python
-* [service](./service) - A simple Go example using the Service resource
-* [stock restful app](./stock-rest-app) - Simple Restful service
-* [thumbnailer](./thumbnailer) - A 'dockerized' web application creating thumbnails from videos
-* [steren's sample-app](./steren-app) - A simple Node.js web application
-* [buildpack sample app](./buildpack-app) - A sample buildpack app
-* [buildpack sample function](./buildpack-function) - A sample buildpack function
-* [steren's sample-function](./steren-function) - A simple Node.js function
-* [private repos](./private-repos/) - A sample illustrating private GitHub / DockerHub
-* [telemetrysample](./telemetrysample) - A simple webserver emitting logs and metrics
-* [gitwebhook](./gitwebhook) - A function that listens for git PR changes and updates the title of them
-* [autoscaler](./autoscale) - A demonstration of revision autoscaling
-* [knative routing](./knative-routing) - A demonstration of mapping multiple Knative services 
-under a single domain.
-
-## Best Practices for Contributing to Samples
-* Minimize dependencies on third party libraries and prefer using standard libraries. Examples:
-    * Use "log" for logging.
+Samples for Knative Serving are available in the
+[Knative Docs repo](https://github.com/knative/docs/tree/master/serving/samples).