chore(*): remove unused code (#6781)

The code removed in the PR was flagged as unused by the JetBrains
inspector.

I did a QA on the dev environment but other checks are highly
recommended.

There is one commit by scope to make the review easier.

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/metadata-modules/remote-server/remote-table/remote-table.service.ts

@@ -601,7 +601,7 @@ export class RemoteTableService {
     columnName: string,
     columnType: string,
     objectMetadataId: string,
-  ): Promise<FieldMetadataEntity<'default'>> {
+  ): Promise<FieldMetadataEntity> {
     return this.fieldMetadataService.createOne({
       name: columnName,
       label: camelToTitleCase(columnName),