Remove unnecessary conditional

With https://gitlab.com/gitlab-org/gitlab/-/merge_requests/35344
RepositoryImportWorker has the `retry: false` already set, so there's
no need to set it only when performing gitlab project imports.

app/models/project.rb

@@ -998,9 +998,6 @@ class Project < ApplicationRecord
     job_id =
       if forked?
         RepositoryForkWorker.perform_async(id)
-      elsif gitlab_project_import?
-        # Do not retry on Import/Export until https://gitlab.com/gitlab-org/gitlab-foss/issues/26189 is solved.
-        RepositoryImportWorker.set(retry: false).perform_async(self.id)
       else
         RepositoryImportWorker.perform_async(self.id)
       end

app/workers/repository_import_worker.rb

@@ -7,6 +7,7 @@ class RepositoryImportWorker # rubocop:disable Scalability/IdempotentWorker
 
   feature_category :importers
   worker_has_external_dependencies!
+  # Do not retry on Import/Export until https://gitlab.com/gitlab-org/gitlab/-/issues/16812 is solved.
   sidekiq_options retry: false
   sidekiq_options status_expiration: Gitlab::Import::StuckImportJob::IMPORT_JOBS_EXPIRATION