kernel: Remove unused variable from the StarPackage class

2013-03-04  Holger Hans Peter Freyther  <holger@freyther.de>

	* kernel/PkgLoader.st: Remove unused variable.
visualgst: Remove the Clock and Tetris from VisualGST

By themself they are nice examples of using GTK with GNU Smalltalk
but in the context of VisualGST they do not provide anything.

2013-03-04  Holger Hans Peter Freyther  <holger@freyther.de>

	* Clock/Clock.st: Remove.
	* Tetris/BlockWidget.st: Remove.
	* Tetris/HighScores.st: Remove.
	* Tetris/Score.st: Remove.
	* Tetris/Tetris.st: Remove.
	* Tetris/TetrisField.st: Remove.
	* Tetris/TetrisFieldWidget.st: Remove.
	* Tetris/TetrisPiece.st: Remove.
	* Tetris/TetrisPieceI.st: Remove.
	* Tetris/TetrisPieceJ.st: Remove.
	* Tetris/TetrisPieceL.st: Remove.
	* Tetris/TetrisPieceO.st: Remove.
	* Tetris/TetrisPieceS.st: Remove.
	* Tetris/TetrisPieceT.st: Remove.
	* Tetris/TetrisPieceWidget.st: Remove.
	* Tetris/TetrisPieceZ.st: Remove.
	* package.xml: Remove traces of Clock and Tetris.