The restbase-mod-table-cassandra module depends on core-js. Historically it was needed because we wanted to use features of newer JS versions in older node versions, but by now we have removed support for those older node versions, so shims are not needed.

Acceptance criteria:

• Direct dependency on core-js is removed.

Testing:

• Restbase-mod-table-cassandra tests pass, RESTBase tests in Cassandra mode pass with an updated package version