Important: #77411 - Removed extbase table column cache 

See forge#77411

Description 

The extbase table column cache extbase_typo3dbbackend_tablecolumns, which was used to store all database fields of all database tables, hass been removed.

The associated configuration variable $GLOBALS[TYPO3_CONF_VARS][SYS][caching][cacheConfigurations][extbase_typo3dbbackend_tablecolumns] can safely be removed.