Removing not supported stuff in config

Signed-off-by: Philipp Rosenberger <[email protected]>

Author: PhRosenberger

doc/_config.adoc

@@ -44,10 +44,6 @@ ifndef::include-only-once[]
 // :images_osi_sensor_model_packaging: ./osi-sensor-model-packaging/doc/images  // example
 :imagesoutdir: ./images/generated_images
 
-:source-highlighter: pygments
-:pygments-style: manni
-:pygments-linenums-mode: inline
-
 endif::[]
 
 ifndef::use-antora-rules[]