Revert "Add is_mandatory extrafield for surveys - refs BT#12915"

This reverts commit c9dda7c3da.

app/Migrations/Schema/V110/Version20170626091800.php

@@ -1,41 +0,0 @@
-<?php
-/* For licensing terms, see /license.txt */
-
-namespace Application\Migrations\Schema\V110;
-
-use Application\Migrations\AbstractMigrationChamilo;
-use Doctrine\DBAL\Schema\Schema;
-
-/**
- * Class Version20170626091800
- *
- * Create extrafield to make survey as mandatory
- *
- * @package Application\Migrations\Schema\V111
- */
-class Version20170626091800 extends AbstractMigrationChamilo
-{
-
-    /**
-     * @param \Doctrine\DBAL\Schema\Schema $schema
-     */
-    public function up(Schema $schema)
-    {
-        $this->addSql("
-            INSERT INTO extra_field
-            (extra_field_type, field_type, variable, display_text, visible, changeable, created_at)
-            VALUES (12, 13, 'is_mandatory', 'IsMandatory', 1, 1, NOW());
-        ");
-    }
-
-    /**
-     * @param \Doctrine\DBAL\Schema\Schema $schema
-     */
-    public function down(Schema $schema)
-    {
-        $this->addSql("
-            DELETE FROM extra_field
-            WHERE extra_field_type = 12 AND field_type = 13 AND variable = 'is_mandatory';
-        ");
-    }
-}

main/install/data.sql

@@ -1800,5 +1800,3 @@ VALUES
 ('show_full_skill_name_on_skill_wheel', 'false', 'No');
 
 UPDATE settings_current SET selected_value = '1.10.0.51' WHERE variable = 'chamilo_database_version';
-
-INSERT INTO extra_field (extra_field_type, field_type, variable, display_text, visible, changeable, created_at) VALUES (12, 13, 'is_mandatory','IsMandatory', 1, 1, NOW());