remove alias in favor of cmdlet name

Remove-OldFiles.ps1

@@ -4,7 +4,7 @@
 If ( $OlderThanDays -is [int] ) {
     If ( Test-Path $Path ) {
         Write-Output "Deleting all items older than ${OlderThanDays} days in ""${Path}"""
-        $files = Get-ChildItem $Path | Where { !$_.PSIsContainer -and $_.LastWriteTime -lt (Get-Date).AddDays(-${OlderThanDays}) }
+        $files = Get-ChildItem $Path | Where-Object { !$_.PSIsContainer -and $_.LastWriteTime -lt (Get-Date).AddDays(-${OlderThanDays}) }
         Foreach ( $f in $files ) {
             $msg = "Deleting {0}" -f $f.FullName ; Write-Output $msg
             Try { Remove-Item $f -Force | Out-Null }