Remove duplicated method.

It was accidentally intropduced when doing a cherry-pick of a merge
request commit.

app/controllers/projects/git_http_client_controller.rb

@@ -153,8 +153,4 @@ class Projects::GitHttpClientController < Projects::ApplicationController
   def verify_workhorse_api!
     Gitlab::Workhorse.verify_api_request!(request.headers)
   end
-
-  def verify_workhorse_api!
-    Gitlab::Workhorse.verify_api_request!(request.headers)
-  end
 end