remove postman files

...oservices/auth/src/studentHellQCM.postman_collection.json

...correction_qcm/src/studentHellQCM.postman_collection.json

...s/creation_qcm/src/studentHellQCM.postman_collection.json

...ces/helloworld/src/studentHellQCM.postman_collection.json

...es/realise_qcm/src/studentHellQCM.postman_collection.json

...ces/search_qcm/src/studentHellQCM.postman_collection.json