DEV: removes very frequent flakey spec (#21696)

plugins/chat/spec/system/archive_channel_spec.rb

@@ -64,20 +64,6 @@ RSpec.describe "Archive channel", type: :system, js: true do
           expect(page).to have_css(".chat-channel-archive-status", wait: 15)
         end
 
-        it "shows an error when the topic is invalid" do
-          Jobs.run_immediately!
-
-          chat.visit_channel_settings(channel_1)
-          click_button(I18n.t("js.chat.channel_settings.archive_channel"))
-          find("#split-topic-name").fill_in(
-            with: "An interesting topic for cats :cat: :cat2: :smile_cat:",
-          )
-          click_button(I18n.t("js.chat.channel_archive.title"))
-
-          expect(page).to have_no_content(I18n.t("js.chat.channel_archive.process_started"))
-          expect(page).to have_content("Title can't have more than 1 emoji")
-        end
-
         context "when archived channels had unreads" do
           before { channel_1.add(current_user) }