removed whatif script

_scripts/whatif.ps1

@@ -1,43 +0,0 @@
-<#
-This script implements WhatIf functionality. When you use it, it will 
-    - backup a package prior a call to update
-    - save updater output to another folder
-    - restore an original package after update finishes
-
-Use it by adding a switch parameter to update.ps1 and surrounding update
-by backup and restore functions:
-
-    param( [switch]$WhatIf )
-
-    ...
-    
-    backup 
-    tru {
-        update ...
-    } finally { restore }
-
-#>
-
-function backup()  { 
-    if (!$WhatIf) { return }
-    Write-Warning "WhatIf passed - package files will not be changed"
-
-    $packageName = Split-Path -Leaf $MyInvocation.PSScriptRoot
-    $d = "$Env:TEMP\au\$packageName"
-
-    rm $d\* -Recurse -ea 0
-    cp . $d\_backup -Recurse 
-}
-
-function restore() { 
-    if (!$WhatIf) { return }
-    
-    $packageName = Split-Path -Leaf $MyInvocation.PSScriptRoot
-    $d = "$Env:TEMP\au\$packageName"
-
-    cp . $d\_output -Recurse 
-    rm .\* -Recurse
-    cp $d\_backup\* . -Recurse 
-
-    Write-Warning "Package saved to: $d\_output"
-}