Remove unused import

Author: Rothes

bukkit/src/main/java/io/github/rothes/protocolstringreplacer/packetlistener/server/BaseServerPacketListener.java

@@ -27,7 +27,6 @@
 import net.md_5.bungee.api.chat.ComponentBuilder;
 import net.md_5.bungee.api.chat.HoverEvent;
 import net.md_5.bungee.api.chat.TextComponent;
-import net.md_5.bungee.chat.ComponentSerializer;
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;