fix pylint issues

web_readonly_bypass/__openerp__.py

@@ -25,10 +25,6 @@
     "maintainer": "ACSONE SA/NV, Odoo Community Association (OCA)",
     "website": "http://www.acsone.eu",
     'category': 'Technical Settings',
-    'depends': [
-        'base',
-        'web',
-    ],
     'description': """
 .. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
     :alt: License: AGPL-3

web_warning_on_save/__openerp__.py

@@ -25,7 +25,7 @@
     "author": "Camptocamp,Odoo Community Association (OCA)",
     'license': 'AGPL-3',
     'website': 'http://www.camptocamp.com',
-    'description': """
+    'description': u"""
     This module was written to extend the functionality of
     saving a record in the web interface.
     /!\/!\/!\ In no way this module stops the save of the record.

web_widget_float_formula/__openerp__.py

@@ -62,5 +62,4 @@ Contacts :
     'application': False,
     'installable': True,
     'auto_install': False,
-    'images': [],
 }