Breaking: #72421 - Removed deprecated code from database and query functions 

See forge#72421

Description 

Removed deprecated code from database and query functions

The following methods have been removed:

DatabaseConnection::splitGroupOrderLimit QueryGenerator::formatQ QueryGenerator::JSbottom ReferenceIndex::error RelationHandler::convertPosNeg

The following properties have been removed:

QueryGenerator::$extJSCODE ReferenceIndex::$errorLog

The option to set soft reference parsers has been removed.

Impact 

Using the one of the methods or properties above will result in a fatal error.

Affected Installations 

Instances which use custom calls to the methods or classes above.