fix API route to delete project hook

lib/api/projects.rb

@@ -274,7 +274,7 @@ module Gitlab
       #   hook_id (required) - The ID of hook to delete
       # Example Request:
       #   DELETE /projects/:id/hooks/:hook_id
-      delete ":id/hooks" do
+      delete ":id/hooks/:hook_id" do
         authorize! :admin_project, user_project
         required_attributes! [:hook_id]
 

spec/requests/api/projects_spec.rb

@@ -467,21 +467,21 @@ describe Gitlab::API do
     end
   end
 
-  describe "DELETE /projects/:id/hooks" do
+  describe "DELETE /projects/:id/hooks/:hook_id" do
     it "should delete hook from project" do
       expect {
-        delete api("/projects/#{project.id}/hooks", user), hook_id: hook.id
+        delete api("/projects/#{project.id}/hooks/#{hook.id}", user)
       }.to change {project.hooks.count}.by(-1)
       response.status.should == 200
     end
 
     it "should return success when deleting hook" do
-      delete api("/projects/#{project.id}/hooks", user), hook_id: hook.id
+      delete api("/projects/#{project.id}/hooks/#{hook.id}", user)
       response.status.should == 200
     end
 
     it "should return success when deleting non existent hook" do
-      delete api("/projects/#{project.id}/hooks", user), hook_id: 42
+      delete api("/projects/#{project.id}/hooks/42", user)
       response.status.should == 200
     end