Scanpst was not removed from Outlook Click-to-run versions, its still under the Office installation folders.
When the click to run version is installed, scanpst is under the root directory in the install path.
C:\Program Files\Microsoft Office 16\root\office16\scanpst.exe
C:\Program Files\Microsoft Office 15\root\office15\scanpst.exe
In the traditional installation using an MSI, scanpst is in the usual location under the Office folder:
C:\Program Files\Microsoft Office\Office15\scanpst.exe
Searching for scanpst on the Start menu search may or may not work.
Outlook 2010 Click to run, scanpst is under the installation directory on the Q drive.