Fix some useless access modifiers in the code

app/controllers/import/bitbucket_controller.rb

@@ -82,8 +82,6 @@ class Import::BitbucketController < Import::BaseController
     go_to_bitbucket_for_permissions
   end
-  private
-
   def access_params
     {
       bitbucket_access_token: session[:bitbucket_access_token],

app/controllers/import/gitlab_controller.rb

@@ -61,8 +61,6 @@ class Import::GitlabController < Import::BaseController
     go_to_gitlab_for_permissions
   end
-  private
-
   def access_params
     { gitlab_access_token: session[:gitlab_access_token] }
   end

app/helpers/diff_helper.rb

@@ -142,8 +142,6 @@ module DiffHelper
     toggle_whitespace_link(url, options)
   end
-  private
-
   def hide_whitespace?
     params[:w] == '1'
   end

app/models/concerns/token_authenticatable.rb

 module TokenAuthenticatable
   extend ActiveSupport::Concern
+  private
+
+  def write_new_token(token_field)
+    new_token = generate_token(token_field)
+    write_attribute(token_field, new_token)
+  end
+
+  def generate_token(token_field)
+    loop do
+      token = Devise.friendly_token
+      break token unless self.class.unscoped.find_by(token_field => token)
+    end
+  end
+
   class_methods do
     def authentication_token_fields
       @token_fields || []
@@ -32,18 +46,4 @@ module TokenAuthenticatable
       end
     end
   end
-
-  private
-
-  def write_new_token(token_field)
-    new_token = generate_token(token_field)
-    write_attribute(token_field, new_token)
-  end
-
-  def generate_token(token_field)
-    loop do
-      token = Devise.friendly_token
-      break token unless self.class.unscoped.find_by(token_field => token)
-    end
-  end
 end