Remove code for creating local links in staged requests

It is not defined how to proceed when a request with local links is
staged. Both options are possible:
- Create links from the target package.
- Create links from the source package.

Until this is defined we remove the code to create links from the target
package.

Fixes #8712 and fixes #8693.

Co-authored-by: David Kang <dkang@suse.com>

src/api/app/models/staging/staged_requests.rb

@@ -111,10 +111,6 @@ def link_package(bs_request_action)
     source_package = Package.get_by_project_and_name!(bs_request_action.source_project,
                                                       bs_request_action.source_package)
 
-    # it is possible that target_package doesn't exist
-    target_package = Package.get_by_project_and_name(bs_request_action.target_project,
-                                                     bs_request_action.target_package)
-
     query_options = { expand: 1 }
     query_options[:rev] = bs_request_action.source_rev if bs_request_action.source_rev
 
@@ -129,13 +125,6 @@ def link_package(bs_request_action)
     create_link(staging_project.name, link_package.name, User.session!, project: source_package.project.name,
                                                                         package: source_package.name, rev: package_rev,
                                                                         vrev: source_vrev)
-    # for multispec packages, we have to create local links to the main package
-    if target_package.present?
-      target_package.find_project_local_linking_packages.each do |local_linking_package|
-        linked_package = Package.find_or_create_by!(project: staging_project, name: local_linking_package.name)
-        create_link(staging_project.name, linked_package.name, User.session!, package: target_package.name, cicount: 'copy')
-      end
-    end
 
     ProjectLogEntry.create!(
       project: staging_project,