config: runtime: baseline: drop running dmesg.sh script

Baseline tests will now just indicate reaching the state of successful
boot. No other test case will be executed there (for the time being).

String: "Hello World!" as a mark of successful boot was chosen to comply
with programming tradition but can be safely replaced with anything else
(easily distinguishable from boot logs).

Signed-off-by: Paweł Wieczorek <[email protected]>

Author: pawiecz

config/runtime/baseline.jinja2

@@ -3,5 +3,5 @@
 {%- extends base_template %}
 
 {% block commands %}
-KERNELCI_LAVA=y /bin/sh /opt/kernelci/dmesg.sh
+echo 'Hello World!'
 {%- endblock %}