doc: getting started: refer to strategy section for how transition() works

Better refer to a working strategy example. This way we can also drop
this untestable code block.

Signed-off-by: Bastian Krause <bst@pengutronix.de>

Author: Bastian-Krause

doc/configuration.rst

@@ -2608,6 +2608,8 @@ Implements:
 Arguments:
   - None
 
+.. _conf-strategies:
+
 Strategies
 ----------
 

doc/getting_started.rst

@@ -465,13 +465,7 @@ strategies.
 
 To use a strategy, add it and its dependencies to your configuration YAML,
 retrieve it in your test and call the ``transition(status)`` function.
-
-.. code-block:: python
-
-   >>> from labgrid import Environment
-   >>> env = Environment("env.yaml")
-   >>> target = env.get_target("main")
-   >>> strategy = target.get_driver("Strategy")
-   >>> strategy.transition("barebox")
+See the section about the various :ref:`shipped strategies <conf-strategies>`
+for examples on this.
 
 An example using the pytest plugin is provided under `examples/strategy`.