Breaking: #67654 - Remove $GLOBALS[FILEICONS] functionality 

See forge#67654

Description 

The global variable $GLOBALS['FILEICONS'] was in use for displaying icons before the sprite icons for files were introduced in TYPO3 v4.4.

The $FILEICONS has been removed completely as well as the function call BackendUtility::getFileIcon().

Impact 

Any usage on $GLOBALS['FILEICONS'] will have no effect anymore.

Any calls on BackendUtility::getFileIcon() will result in a fatal error.

Affected Installations 

Instances that populate or make use of $GLOBALS['FILEICONS'] or installations with extensions calling BackendUtility::getFileIcon() directly.

Migration 

Use sprite icons via IconUtility::getSpriteIconForFile().