Revert "Connect - Relation on FE Importer (#13213)" (#13313)

This reverts commit cc71394863.

Regression introduced in https://github.com/twentyhq/twenty/pull/13213
The import/export use an upsert logic and when it goes through the
"update" path it fails due to the connect not being implemented yet
(should be in https://github.com/twentyhq/core-team-issues/issues/1230)

---------

Co-authored-by: prastoin <paul@twenty.com>

packages/twenty-shared/src/utils/index.ts

@@ -15,7 +15,6 @@ export {
   sanitizeURL,
   getLogoUrlFromDomainName,
 } from './image/getLogoUrlFromDomainName';
-export { getUniqueConstraintsFields } from './indexMetadata/getUniqueConstraintsFields';
 export { parseJson } from './parseJson';
 export { removeUndefinedFields } from './removeUndefinedFields';
 export { getGenericOperationName } from './sentry/getGenericOperationName';