chore(GlButton): migrate stories to CSF
What does this MR do?
This migrates GlButton
stories to the Component Story Format.
Examples have been superseded by new or existing stories and removed. gitlab-org/gitlab-services/design.gitlab.com!2449 (merged) updates button examples in Pajamas with the latest changes from GitLab UI.
Closes #1324 (closed)
Edited by Paul Gascou-Vaillancourt