Remove SharePoint Search Topology

#removes a search topology with the identity xxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. Replace with your topology id (found by running first line manually)

$ssa = Get-SPEnterpriseSearchServiceApplication

$topology = Get-SPEnterpriseSearchTopology -SearchApplication $ssa -Identity [xxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx]

Remove-SPEnterpriseSearchTopology -Identity $topology