Remove fine-tuning flow (#2872)

frontend/src/App.jsx

frontend/src/models/experimental/fineTuning.js

frontend/src/pages/FineTuning/Steps/Confirmation/index.jsx

frontend/src/pages/FineTuning/Steps/DataUpload/index.jsx

...nd/src/pages/FineTuning/Steps/FulfillmentPolicy/index.jsx

frontend/src/pages/FineTuning/Steps/Introduction/index.jsx

frontend/src/pages/FineTuning/Steps/OrderDetails/index.jsx

frontend/src/pages/FineTuning/Steps/OrderPlaced/index.jsx

frontend/src/pages/FineTuning/Steps/Privacy/index.jsx

...d/src/pages/FineTuning/Steps/TermsAndConditions/index.jsx

frontend/src/pages/FineTuning/Steps/index.jsx

frontend/src/pages/FineTuning/index.jsx

frontend/src/pages/GeneralSettings/Chats/index.jsx

frontend/src/utils/paths.js

server/endpoints/experimental/fineTuning.js

server/endpoints/experimental/index.js

server/models/fineTuning.js