The Lecture Object Repository (LORI) is a non-standard integration API that I developed with the hope that a standards-based API that would allow a repository to be integrated into an LMS like Sakai.
I don't think that the code was every used except for a few months as a test at Indiana University.
The problem is that this is being replaced by the use of the emerging IMS Content Item Specification which will be used across LMS systems.
The problem is that supporting the LORI API ends up with some circular dependencies between Lessonbuilder and BasicLTI. As we move towards implementing IMS Content Item in Lessons, there will increasing dependence of Lessons on LTI making the circular dependency worse.
So by removing the unused LORI API support - we eleiminate the circular dependency and the implementation of IMS ContentItem can progress.