Removed old rendering system

Removed old rendering system. Some parts may be left over, but they
won't affect testing.
1.10-R todo tag marks things to do with rendering.

src/main/java/appeng/block/networking/BlockDenseEnergyCell.java

@@ -21,8 +21,6 @@ package appeng.block.networking;
 
 import java.util.EnumSet;
 
-import appeng.api.util.IAESprite;
-import appeng.client.texture.ExtraBlockTextures;
 import appeng.core.features.AEFeature;
 import appeng.tile.networking.TileDenseEnergyCell;
 
@@ -36,31 +34,6 @@ public class BlockDenseEnergyCell extends BlockEnergyCell
 		this.setFeature( EnumSet.of( AEFeature.DenseEnergyCells ) );
 	}
 
-	@Override
-	public IAESprite getIcon( final net.minecraft.util.EnumFacing side, final net.minecraft.block.state.IBlockState state )
-	{
-		switch( (int) state.getValue( ENERGY_STORAGE ) )
-		{
-			default:
-			case 0:
-				return ExtraBlockTextures.MEDenseEnergyCell0.getIcon();
-			case 1:
-				return ExtraBlockTextures.MEDenseEnergyCell1.getIcon();
-			case 2:
-				return ExtraBlockTextures.MEDenseEnergyCell2.getIcon();
-			case 3:
-				return ExtraBlockTextures.MEDenseEnergyCell3.getIcon();
-			case 4:
-				return ExtraBlockTextures.MEDenseEnergyCell4.getIcon();
-			case 5:
-				return ExtraBlockTextures.MEDenseEnergyCell5.getIcon();
-			case 6:
-				return ExtraBlockTextures.MEDenseEnergyCell6.getIcon();
-			case 7:
-				return ExtraBlockTextures.MEDenseEnergyCell7.getIcon();
-		}
-	}
-
 	@Override
 	public double getMaxPower()
 	{