Add migration helper to drop columns

framework/core/src/Database/Migration.php

@@ -74,6 +74,19 @@ abstract class Migration
         ];
     }
 
+    /**
+     * Drop columns from a table.
+     */
+    public static function dropColumns($tableName, array $columnDefinitions)
+    {
+        $inverse = static::addColumns($tableName, $columnDefinitions);
+
+        return [
+            'up' => $inverse['down'],
+            'down' => $inverse['up']
+        ];
+    }
+
     /**
      * Rename a column.
      */