Remove security report summary from pipelines view

This removes the Vue component, corresponding tests and haml/bundle
entry points for the Security Report summary in the pipelines view

app/views/projects/pipelines/_info.html.haml

@@ -30,5 +30,3 @@
     %span.js-details-content.hide
       = link_to @pipeline.sha, project_commit_path(@project, @pipeline.sha), class: "commit-sha commit-hash-full"
     = clipboard_button(text: @pipeline.sha, title: "Copy commit SHA to clipboard")
-
-  = render_if_exists "projects/pipelines/info_extension", pipeline: @pipeline