remove docs from README.rst, including them only in __init__.py

instrumentation/opentelemetry-instrumentation-pika/README.rst

@@ -62,22 +62,6 @@ Usage
 .. code-block:: python
 
     PikaInstrumentor.instrument_channel(channel, tracer_provider=tracer_provider)
-
-* PikaInstrumentor also supports instrumenting with hooks that will be called when producing or consuming a message.
-  The hooks should be of type `Callable[[Span, bytes, BasicProperties], None]`
-  where the first parameter is the span, the second parameter is the message body
-  and the third parameter is the message properties
-
-.. code-block:: python
-
-    def publish_hook(span: Span, body: bytes, properties: BasicProperties):
-        span.set_attribute("messaging.payload", body.decode())
-
-    def consume_hook(span: Span, body: bytes, properties: BasicProperties):
-        span.set_attribute("messaging.id", properties.message_id)
-
-    PikaInstrumentor.instrument_channel(channel, publish_hook=publish_hook, consume_hook=consume_hook)
-
 References
 ----------