Removed unnecessary paramter hash. Also tidied up hash format in hook creation spec

spec/requests/api/projects_spec.rb

@@ -261,7 +261,7 @@ describe Gitlab::API do
     it "should add hook to project" do
       expect {
         post api("/projects/#{project.id}/hooks", user),
-          "url" => "http://example.com"
+          url: "http://example.com"
       }.to change {project.hooks.count}.by(1)
     end
   end
@@ -278,8 +278,7 @@ describe Gitlab::API do
   describe "DELETE /projects/:id/hooks/:hook_id" do
     it "should delete hook from project" do
       expect {
-        delete api("/projects/#{project.id}/hooks/#{hook.id}", user),
-          hook_id: hook.id
+        delete api("/projects/#{project.id}/hooks/#{hook.id}", user)
       }.to change {project.hooks.count}.by(-1)
     end
   end