Building Visual Studio Setup/Deploy project asks to install 2010 shell integrated
I actually found a solution to this now over at Microsoft's Visual Studio Developer Community (Quoted relevant parts to prevent the likelihood of future dead links):
1- Open a cmd as admin.
2- Go to directory C:\Program Files (x86)\Common Files\microsoft shared\MSI Tools
3- run: regsvr32.exe /u mergemod.dll"
4- run: regsvr32.exe mergemod.dll"
I followed these steps, restarted VS2017 and it worked perfectly. No more request for the VS2010 Integrated Shell installer!