/* Hide "add element" in list of all stores in estimation report */
.editable_reports_tree .oe_form_field_one2many_list_row_add { 
    display: none;   
}

/* Hide "add element" in list of all stores in estimation report */
.editable_reports_tree .oe_form_field_one2many_list_row_add { 
    display: none;   
}

/* Hide the delete icon */
.editable_reports_tree .oe_list_record_delete { 
    display: none;   
}

Remove ability to remove stores in estimation reports
Remove ability to remove stores in estimation reports
