deleted uneccessayra brick classes (enum will handle this)

src/de/bricked/game/board/Board.java

src/de/bricked/game/bricks/AirBrick.java

src/de/bricked/game/bricks/Brick.java

src/de/bricked/game/bricks/ExtraHardBrick.java

src/de/bricked/game/bricks/HardBrick.java

src/de/bricked/game/bricks/InvisibleBrick.java

src/de/bricked/game/bricks/NormalBrick.java

src/de/bricked/game/bricks/SolidBrick.java

src/de/bricked/game/bricks/TNTBrick.java

src/de/bricked/game/config/BrickType.java

src/de/bricked/ui/LevelController.java

src/de/bricked/ui/LevelSelectController.java