codesearch shows that this file is not used anywhere else:
http://codesearch.openstack.org/?q=run-jsbuild.sh&i=nope&files=&repos=
Looking at the history of this repo, it was used in these legacy jobs
legacy-vinz-webclient-js-release-branch
legacy-vinz-webclient-js-release-master
legacy-merlin-js-release-branch
legacy-merlin-js-release-master
legacy-storyboard-js-integration-ubuntu-trusty
legacy-storyboard-js-integration
legacy-storyboard-webclient-js-draft
legacy-storyboard-webclient-js-release-branch
legacy-storyboard-webclient-js-release-master
All these jobs either got replaces by native Zuul v3 jobs or the repos
retired and thus jobs removed completely.
The file should have been removed as part of
Icda2d699c26a03a5a5b0718ce90fe7813f0f0061.
I also grepped through all branches of existing repos and could not find
any occurence of run-jsbuild.sh (assuming my script is correct).
Thus, we can remove the file.
Change-Id: I9480ecb39d9fadbe97b393d03521118a26cd68f5