Removed unused import.

src/main/java/com/gmail/nossr50/listeners/BlockListener.java

@@ -37,7 +37,6 @@ import org.bukkit.event.block.BlockPistonExtendEvent;
 import org.bukkit.event.block.BlockPistonRetractEvent;
 import org.bukkit.event.block.BlockPlaceEvent;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.metadata.FixedMetadataValue;
 
 import org.getspout.spoutapi.sound.SoundEffect;