I definitely believe in scaling the bureacracy and overhead to the size of the project, however there are some elements of stakeholder management that are essential to all.
For example, do you need a contact list or will you enter all the contacts into your SmartPhone? This might be useful if you are managing 20 or more clients and client projects. Does your employer need you to keep a list, perhaps in a CRM system to track activity? If your software product is on a subscription basis, maintaining good contact at multiple levels in the organization may be important. Your small project may affect the renewal.
There is definitely merit to scaling back, but I would suggest you look more closely at the details before discarding all elements.