Remove the  field as is deprecated in the `ir.ui.view` model.

Removes the following warnings:
```
2014-09-03 13:57:12,695 28876 WARNING oif openerp.addons.base.ir.ir_ui_view: Setting the `type` field is deprecated in the `ir.ui.view` model.
2014-09-03 13:57:12,702 28876 WARNING oif openerp.addons.base.ir.ir_ui_view: Setting the `type` field is deprecated in the `ir.ui.view` model.
```