Deactivate partial index support for Sqlite

While technically it could work, the schema introspection of Sqlite
platform has severe flaws preventing us to provide reliable support
of partial (and non-partial) indexes for the moment.

UPGRADE.md

@@ -3,8 +3,8 @@
 ## BC BREAK: Doctrine\DBAL\Schema\Table
 
 The methods ``addIndex()`` and ``addUniqueIndex()`` in ``Doctrine\DBAL\Schema\Table``
-hav an additional, optional parameter. If you override this method, you should
-add this new parameter to the declaration of your overridden method.
+hav an additional, optional parameter. If you override these methods, you should
+add this new parameter to the declaration of your overridden methods.
 
 ## BC BREAK: Doctrine\DBAL\Connection
 

lib/Doctrine/DBAL/Platforms/SqlitePlatform.php

@@ -463,14 +463,6 @@ class SqlitePlatform extends AbstractPlatform
         return true;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function supportsPartialIndexes()
-    {
-        return true;
-    }
-
     /**
      * {@inheritDoc}
      */

tests/Doctrine/Tests/DBAL/Platforms/SqlitePlatformTest.php

@@ -497,11 +497,6 @@ class SqlitePlatformTest extends AbstractPlatformTestCase
         );
     }
 
-    public function testSupportsPartialIndexes()
-    {
-        $this->assertTrue($this->_platform->supportsPartialIndexes());
-    }
-
     /**
      * @group DBAL-807
      */