Remove example/README.md that referenced moved HTTP example (#1066)

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

example/README.md

@@ -1,46 +0,0 @@
-# Example
-
-## HTTP
-This is a simple example that demonstrates tracing http request from client to server. The example
-shows key aspects of tracing such as:
-
-- Root Span (on Client)
-- Child Span (on Client)
-- Child Span from a Remote Parent (on Server)
-- SpanContext Propagation (from Client to Server)
-- Span Events
-- Span Attributes
-
-Example uses
-- open-telemetry SDK as trace instrumentation provider,
-- httptrace plugin to facilitate tracing http request on client and server
-- http trace_context propagation to propagate SpanContext on the wire.
-- stdout exporter to print information about spans in the terminal
-
-### How to run?
-
-#### Prequisites
-
-- go 1.13 installed
-- GOPATH is configured.
-
-#### 1 Download git repo
-```
-GO111MODULE="" go get -d go.opentelemetry.io/otel
-```
-
-#### 2 Start Server
-```
-cd $GOPATH/src/go.opentelemetry.io/otel/example/http/
-go run ./server/server.go
-```
-
-#### 3 Start Client
-```
-cd $GOPATH/src/go.opentelemetry.io/otel/example/http/
-go run ./client/client.go
-```
-
-#### 4 Check traces in stdout
-
-The spans should be visible in stdout in the order that they were exported.