remove source based container build
also remove the source builds for schedules, package builds still run on schedule so the build is still tested
[ci skip]
Maintenance will be performed on git.ligo.org, containers.ligo.org, and docs.ligo.org on Tuesday 23 April 2024 starting at approximately 9am PDT. It is expected to take around twenty minutes and there will be several periods of downtime throughout the maintenance. Please address any comments, concerns, or questions to the helpdesk.
also remove the source builds for schedules, package builds still run on schedule so the build is still tested
[ci skip]