Fix redundant cache expiration in Repository

app/models/repository.rb

@@ -407,8 +407,6 @@ class Repository
   # Runs code after a repository has been forked/imported.
   def after_import
     expire_content_cache
-    expire_tags_cache
-    expire_branches_cache
   end
 
   # Runs code after a new commit has been pushed.

changelogs/unreleased/fix_cache_expiration_in_repository.yml

+---
+title: Fix redundant cache expiration in Repository
+merge_request: 10575
+author: blackst0ne

spec/models/repository_spec.rb

@@ -1283,8 +1283,6 @@ describe Repository, models: true do
   describe '#after_import' do
     it 'flushes and builds the cache' do
       expect(repository).to receive(:expire_content_cache)
-      expect(repository).to receive(:expire_tags_cache)
-      expect(repository).to receive(:expire_branches_cache)
 
       repository.after_import
     end