Nuget_remove_all

// Remove all nuget packages from project

$packages = Get-Package -ProjectName MyProjectName; 
foreach($package in $packages) {
  Uninstall-Package -ProjectName MyProjectName -Id $package.Id -Force
}

// Remove all nuget packages from all projects from solution

foreach($project in $projects) { 
  $packages = Get-Package -ProjectName $project.Name; 
  foreach($package in $packages){ 
    Uninstall-Package -ProjectName $project.Name -Id $package.Id -Force
  }
}