DEV: Remove unnecessary rails_helper requiring (#26364)

plugins/chat/spec/serializer/chat/channel_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 describe Chat::ChannelSerializer do
   subject(:serializer) { described_class.new(chat_channel, scope: guardian, root: nil) }
 

plugins/chat/spec/serializer/chat/chat_message_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 describe Chat::MessageSerializer do
   subject(:serializer) { described_class.new(message_1, scope: guardian, root: nil) }
 

plugins/chat/spec/serializer/chat/chat_message_user_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 RSpec.describe Chat::MessageUserSerializer do
   subject(:serializer) do
     user = Fabricate(:user, **params)

plugins/chat/spec/serializer/chat/chat_thread_original_message_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 describe Chat::ThreadOriginalMessageSerializer do
   subject(:serializer) { described_class.new(message_1, scope: guardian, root: nil) }
 

plugins/chat/spec/serializer/chat/chatables_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 describe Chat::ChatablesSerializer do
   context "with status" do
     fab!(:user_1) { Fabricate(:user) }

plugins/chat/spec/serializer/chat/direct_message_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 describe Chat::DirectMessageSerializer do
   describe "#user" do
     it "returns you when there are two of us" do

plugins/chat/spec/serializer/chat/in_reply_to_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 RSpec.describe Chat::InReplyToSerializer do
   subject(:serializer) { described_class.new(message, scope: guardian, root: nil) }
 

plugins/chat/spec/serializer/chat/thread_original_message_serializer_spec.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require "rails_helper"
-
 RSpec.describe Chat::ThreadOriginalMessageSerializer do
   describe "#user" do
     fab!(:user_status) { Fabricate(:user_status) }