The V2 libraries project had a few past iterations which were never
launched. This commit cleans up pieces from those which we don't need
for the real Libraries Relaunch MVP in Sumac:
* Remove ENABLE_LIBRARY_AUTHORING_MICROFRONTEND,
LIBRARY_AUTHORING_FRONTEND_URL, and
REDIRECT_TO_LIBRARY_AUTHORING_MICROFRONTEND, all of which are obsolete
now that library authoring has been merged into
https://github.com/openedx/frontend-app-authoring.
More details on the new Content Libraries configuration settings are
here: https://github.com/openedx/frontend-app-authoring/issues/1334
* Remove dangling support for syncing V2 (learning core-backed) library
content using the LibraryContentBlock. This code was all based on an
older understanding of V2 Content Libraries, where the libraries were
smaller and versioned as a whole rather then versioned by-item.
Reference to V2 libraries will be done on a per-block basis using
the upstream/downstream system, described here:
https://github.com/openedx/edx-platform/blob/master/docs/decisions/0020-upstream-downstream.rst
It's important that we remove this support now so that OLX course
authors don't stuble upon it and use it, which would be buggy and
complicate future migrations.
* Remove the "mode" parameter from LibraryContentBlock. The only
supported mode was and is "random". We will not be adding any further
modes. Going forward for V2, we will have an ItemBank block for
randomizing items (regardless of source), which can be synthesized
with upstream referenced as described above. Existing
LibraryContentBlocks will be migrated.
* Finally, some renamings:
* LibraryContentBlock -> LegacyLibraryContentBlock
* LibraryToolsService -> LegacyLibraryToolsService
* LibrarySummary -> LegacyLibrarySummary
Module names and the old OLX tag (library_content) are unchanged.
Closes: https://github.com/openedx/frontend-app-authoring/issues/1115