MIT Licesne – include in iOS App

My boss wants me to create an app for inside usage of the company( a prototype), and I need to use a MIT licensed software.
When I look at the license it says:
"The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.".
Am I obligated to put credits in the app? he didn't ask for that and creating for a menu with credits button will take time for me that will cost him money. Am I allowed to keep the license in the source Code and not display it, even though the source code is compiled and not disclosed?