Remove useless variables for common object

Fields name / civility / ... are nonsense for a lot of objects into Dolibarr.
They could be defined for each object instead of into the common object class.
This for the API which exposes a property civility for a category :\

htdocs/core/class/commonobject.class.php

@@ -91,11 +91,10 @@ abstract class CommonObject
      */
     public $canvas;
 
-
+    /**
-    public $name;
+     *
-    public $lastname;
+     * @var object      Thirdparty associated with object
-    public $firstname;
+     */
-    public $civility_id;
     public $thirdparty;
 
     // No constructor as it is an abstract class