Remove date from author line since that is already present in `created_at`

lib/gitlab/bitbucket_server_import/importer.rb

@@ -303,7 +303,7 @@ module Gitlab
 
         unless author
           author = project.creator_id
-          note = "*By #{comment.author_username} (#{comment.author_email}) on #{comment.created_at}*\n\n"
+          note = "*By #{comment.author_username} (#{comment.author_email})*\n\n"
         end
 
         note +=

spec/lib/gitlab/bitbucket_server_import/importer_spec.rb

@@ -169,7 +169,7 @@ describe Gitlab::BitbucketServerImport::Importer do
 
       reply_note = notes.last
       # Make sure author and reply context is included
-      expect(reply_note.note).to start_with("*By #{reply.author_username} (#{reply.author_email}) on #{reply.created_at}*\n\n")
+      expect(reply_note.note).to start_with("*By #{reply.author_username} (#{reply.author_email})*\n\n")
       expect(reply_note.note).to end_with("> #{inline_note.note}\n\n#{reply.note}")
       expect(reply_note.author).to eq(project.owner)
       expect(reply_note.created_at).to eq(reply.created_at)