Avoid calling freeze on already frozen strings in app/controllers

app/controllers/application_controller.rb

@@ -47,8 +47,8 @@ class ApplicationController < ActionController::Base
   # Adds `no-store` to the DEFAULT_CACHE_CONTROL, to prevent security
   # concerns due to caching private data.
-  DEFAULT_GITLAB_CACHE_CONTROL = "#{ActionDispatch::Http::Cache::Response::DEFAULT_CACHE_CONTROL}, no-store".freeze
-  DEFAULT_GITLAB_CONTROL_NO_CACHE = "#{DEFAULT_GITLAB_CACHE_CONTROL}, no-cache".freeze
+  DEFAULT_GITLAB_CACHE_CONTROL = "#{ActionDispatch::Http::Cache::Response::DEFAULT_CACHE_CONTROL}, no-store"
+  DEFAULT_GITLAB_CONTROL_NO_CACHE = "#{DEFAULT_GITLAB_CACHE_CONTROL}, no-cache"
   rescue_from Encoding::CompatibilityError do |exception|
     log_exception(exception)
@@ -143,7 +143,7 @@ class ApplicationController < ActionController::Base
       payload[:username] = logged_user.try(:username)
     end
-    if response.status == 422 && response.body.present? && response.content_type == 'application/json'.freeze
+    if response.status == 422 && response.body.present? && response.content_type == 'application/json'
       payload[:response] = response.body
     end

app/controllers/concerns/lfs_request.rb

@@ -12,7 +12,7 @@
 module LfsRequest
   extend ActiveSupport::Concern
-  CONTENT_TYPE = 'application/vnd.git-lfs+json'.freeze
+  CONTENT_TYPE = 'application/vnd.git-lfs+json'
   included do
     before_action :require_lfs_enabled!

app/controllers/projects/lfs_api_controller.rb

@@ -3,7 +3,7 @@
 class Projects::LfsApiController < Projects::GitHttpClientController
   include LfsRequest
-  LFS_TRANSFER_CONTENT_TYPE = 'application/octet-stream'.freeze
+  LFS_TRANSFER_CONTENT_TYPE = 'application/octet-stream'
   skip_before_action :lfs_check_access!, only: [:deprecated]
   before_action :lfs_check_batch_operation!, only: [:batch]

app/controllers/sessions_controller.rb

@@ -40,7 +40,7 @@ class SessionsController < Devise::SessionsController
   # token mismatch.
   protect_from_forgery with: :exception, prepend: true
-  CAPTCHA_HEADER = 'X-GitLab-Show-Login-Captcha'.freeze
+  CAPTCHA_HEADER = 'X-GitLab-Show-Login-Captcha'
   MAX_FAILED_LOGIN_ATTEMPTS = 5
   def new
@@ -111,14 +111,14 @@ class SessionsController < Devise::SessionsController
   def increment_failed_login_captcha_counter
     Gitlab::Metrics.counter(
       :failed_login_captcha_total,
-      'Number of failed CAPTCHA attempts for logins'.freeze
+      'Number of failed CAPTCHA attempts for logins'
     ).increment
   end
   def increment_successful_login_captcha_counter
     Gitlab::Metrics.counter(
       :successful_login_captcha_total,
-      'Number of successful CAPTCHA attempts for logins'.freeze
+      'Number of successful CAPTCHA attempts for logins'
     ).increment
   end