how to remove migration code example

Example 1: laravel migration remove column

public function up()
{
  Schema::table('table', function($table) {
    $table->dropColumn('column_name');
  });
}

Example 2: ef remove migration

/*to remove the last migration:*/
/*Visual Studio:*/
Remove-Migration
/*.Net Core CLI:*/
dotnet ef migrations remove

Example 3: ef core delete all migrations

dotnet ef database drop -f -v
dotnet ef migrations add Initial
dotnet ef database update