remove string attribute on tree views

Author: alexis-via

donation/report/donation_report_view.xml

@@ -96,7 +96,7 @@
         <field name="name">donation.report.tree</field>
         <field name="model">donation.report</field>
         <field name="arch" type="xml">
-            <tree string="Donations">
+            <tree>
                 <field name="partner_id" />
                 <field name="donation_date" />
                 <field name="country_id" />

donation/views/donation.xml

@@ -147,7 +147,7 @@
         <field name="name">donation.tree</field>
         <field name="model">donation.donation</field>
         <field name="arch" type="xml">
-            <tree string="Donation">
+            <tree>
                 <header>
                         <button
                         name="%(donation_validate_action)d"
@@ -301,7 +301,7 @@
         <field name="name">donation.line.tree</field>
         <field name="model">donation.line</field>
         <field name="arch" type="xml">
-            <tree string="Donation Line" editable="bottom">
+            <tree editable="bottom">
                 <field name="sequence" widget="handle" />
                 <field
                     name="donation_id"

donation/views/donation_campaign.xml

@@ -34,7 +34,7 @@
         <field name="name">donation.campaign.tree</field>
         <field name="model">donation.campaign</field>
         <field name="arch" type="xml">
-            <tree string="Donation Campaigns">
+            <tree>
                 <field name="sequence" widget="handle" />
                 <field name="code" optional="show" />
                 <field name="name" />

donation/views/donation_thanks_template.xml

@@ -33,7 +33,7 @@
 <record id="donation_thanks_template_tree" model="ir.ui.view">
     <field name="model">donation.thanks.template</field>
     <field name="arch" type="xml">
-        <tree string="Donation Thanks Templates">
+        <tree>
             <field name="sequence" widget="handle" />
             <field name="name" />
             <field

donation_base/views/donation_tax_receipt.xml

@@ -51,7 +51,7 @@
         <field name="name">donation.tax.receipt.tree</field>
         <field name="model">donation.tax.receipt</field>
         <field name="arch" type="xml">
-            <tree string="Donation Tax Receipt">
+            <tree>
                 <field name="number" />
                 <field name="partner_id" />
                 <field name="date" />