remove duplicate before_filter

app/controllers/hooks_controller.rb

 class HooksController < ApplicationController
-  before_filter :authenticate_user!
   before_filter :project
   layout "project"

app/controllers/issues_controller.rb

 class IssuesController < ApplicationController
-  before_filter :authenticate_user!
   before_filter :project
   before_filter :module_enabled
   before_filter :issue, only: [:edit, :update, :destroy, :show]

app/controllers/labels_controller.rb

 class LabelsController < ApplicationController
-  before_filter :authenticate_user!
   before_filter :project
   before_filter :module_enabled

app/controllers/merge_requests_controller.rb

 class MergeRequestsController < ApplicationController
-  before_filter :authenticate_user!
   before_filter :project
   before_filter :module_enabled
   before_filter :merge_request, only: [:edit, :update, :destroy, :show, :commits, :diffs, :automerge, :automerge_check, :raw]

app/controllers/milestones_controller.rb

 class MilestonesController < ApplicationController
-  before_filter :authenticate_user!
   before_filter :project
   before_filter :module_enabled
   before_filter :milestone, only: [:edit, :update, :destroy, :show]

app/controllers/snippets_controller.rb

 class SnippetsController < ApplicationController
-  before_filter :authenticate_user!
   before_filter :project
   before_filter :snippet, only: [:show, :edit, :destroy, :update, :raw]
   layout "project"