File "./tutorial/proofs/t11_tree_set/generated_proof_remove.v", line 31, characters 2-6:Error: (in proof type_remove): Attempt to save a proof with given up goals.If this is really what you want to do, use Admitted in place of Qed.Makefile:6: recipe for target 'all_with_examples' failedmake: *** [all_with_examples] Error 1ERROR: Job failed: exit code 1