Fix deletion of scheduled task with unknown or empty task trigger

Author: matt6697

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Fix master branch AppVeyor badge link URL in README.MD - See [Issue #140](https://github.com/PowerShell/xComputerManagement/issues/140).
+- Fix deletion of scheduled task with unknown or empty task trigger. Get-TargetResource returns an empty ScheduleType string if the task trigger is empty or unknown - See [Issue #137](https://github.com/PowerShell/xComputerManagement/issues/137)
 
 ## 4.0.0.0
 

Modules/xComputerManagement/DSCResources/MSFT_xScheduledTask/MSFT_xScheduledTask.psm1

@@ -438,9 +438,7 @@ function Get-TargetResource
 
             default
             {
-                New-InvalidArgumentException `
-                    -Message ($script:localizedData.TriggerTypeError -f $trigger.CimClass.CimClassName) `
-                    -ArgumentName CimClassName
+                $returnScheduleType = ''
             }
         }