If you haven't powered on the VM yet, you could be in luck.
The OSGuestCustomization adds a line to the VMX file of the VM. That line looks something like this
tools.deployPkg.fileName = "imc7200.tmp"
You can't remove entries from a VMX file afaik, but you can change the value of an entry.
The following will do just that for the customisation entry.
$vmName="TestVM"$vm=Get-VM-Name$vmName
Get-AdvancedSetting-Entity$vm|
where {$_.Name-eq"tools.deployPkg.fileName"} |
Set-AdvancedSetting-Value""-Confirm:$false
Try running this script, copy/clone the VM so you have a fallback and then poweron the VM.