powershell - Power Shell script to delete the User profiles from the windows server 2008 r2 to local machine(Windows 7)

I tried the following script on a Windows Server 2008 R2 to delete the User Profiles on a Windows 7 client machine.

PS C:\> get-content localcomputer-list.txt | get-userprofile | where {$_.LastUse 'lt (Get-Date).AddDays(-90)}} | remove-userprofile -whatif

It doesn't work.

How do I resolve this?