[offline] Remove useless explicit reference to AlgoliaSearchOfflineCore framework
[offline] Remove useless explicit reference to AlgoliaSearchOfflineCore framework

The dependency is drawn by Cocoapods.

algoliareadmebot/algoliasearch-client-swift,algolia/algoliasearch-client-swift,algolia/algoliasearch-client-swift,algoliareadmebot/algoliasearch-client-swift,algoliareadmebot/algoliasearch-client-swift