Remove all resources from Subscription

@"
{
  "`$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {},
  "variables": {},
  "resources": [],
  "outputs": {}
}
"@ > $env:TEMP\ResourceGroupCleanup.template.json

foreach ($item in (Get-AzureRmResourceGroup))
{
    $name = $item.ResourceGroupName
    New-AzureRmResourceGroupDeployment -ResourceGroupName $name -Mode Complete -TemplateFile $env:TEMP\ResourceGroupCleanup.template.json -Force -Verbose
}