Improve code readability in binnie.genetics package

Drop unused (empty) method MachinePackage#register() from all classes

src/main/java/binnie/extratrees/machines/ExtraTreeMachine.java

@@ -91,10 +91,6 @@ public enum ExtraTreeMachine implements IMachineType
 			return new TileEntityMachine(this);
 		}
 
-		@Override
-		public void register() {
-		}
-
 		@Override
 		public void renderMachine(final Machine machine, final double x, final double y, final double z, final float partialTick, final RenderBlocks renderer) {
 			MachineRendererForestry.renderMachine(this.textureName.getShortPath(), x, y, z, partialTick);