I am working on some particular Jenkins pipeline which has many steps included - most of which are written in Groovy - because of that I am seeing many [Pipeline]
This is a bit old but have a look at the blue ocean plugin. It totally alters the way you view pipelines and you may find that these messages are no longer an issue.
We just fixed this following the CSS-based solution in Suppress Scripted Pipelines Output in Jenkins
It looks like the CSS elements might have changed, since the accepted answer:
.pipeline-annotated {
display: none;
}
didn't work for me, I had to use the .pipeline-new-node
CSS class shown in another answer.