Deprecate AbstractPlatform::fixSchemaElementName()

UPGRADE.md

 # Upgrade to 2.11
 
+## `AbstractPlatform::fixSchemaElementName()` is deprecated.
+
+The method is not used anywhere except for tests.
+
 ##`ServerInfoAwareConnection::requiresQueryForServerVersion()` is deprecated.
 
 The `ServerInfoAwareConnection::requiresQueryForServerVersion()` method has been deprecated as an implementation detail which is the same for almost all supported drivers.

lib/Doctrine/DBAL/Platforms/AbstractPlatform.php

@@ -3478,6 +3478,8 @@ abstract class AbstractPlatform
      * Makes any fixes to a name of a schema element (table, sequence, ...) that are required
      * by restrictions of the platform, like a maximum length.
      *
+     * @deprecated
+     *
      * @param string $schemaElementName
      *
      * @return string

lib/Doctrine/DBAL/Platforms/OraclePlatform.php

@@ -1075,6 +1075,8 @@ SQL
 
     /**
      * {@inheritDoc}
+     *
+     * @deprecated
      */
     public function fixSchemaElementName($schemaElementName)
     {