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/items/materials/MultiItem.java

@@ -141,19 +141,6 @@ public final class MultiItem extends AEBaseItem implements IStorageComponent, IU
 		}
 	}
 
-	@Override
-	@SideOnly( Side.CLIENT )
-	public void registerIcons( final ClientHelper proxy, final String name )
-	{
-		for( final MaterialType type : MaterialType.values() )
-		{
-			if( type != MaterialType.InvalidType )
-			{
-				proxy.setIcon( this, type.getDamageValue(), name + "." + type.name() );
-			}
-		}
-	}
-
 	public MaterialType getTypeByStack( final ItemStack is )
 	{
 		if( this.dmgToMaterial.containsKey( is.getItemDamage() ) )