Delete a Windows service (works fine with service names containing spaces too; uses the service's short name; i.e. Service Name rather than Display Name ). See https://stackoverflow.com/a/76127/361842 for more info.

Remove-Service.ps1

function Remove-Service {
    [CmdletBinding()]
    Param (
        [Parameter()]
        [string]$Name
    )
    Process {
        #could be improved by implementing everything the full suite of parameters that Start/Stop-Service have; for now just fulfils the most basic requirement
        Stop-Service -Name $Name -Force -ErrorAction SilentlyContinue 
        sc.exe delete $Name 
    }
}

Can also be handled using WMI; I may change it in a later implentation to allow this to handle more advanced scenarios.

$service = Get-WmiObject -Class Win32_Service -Filter "Name='servicename'"
$service.delete()

There's also a much better implementation coming soon to a PowerShell near you: PowerShell/PowerShell#4858