Implements the remove condition command and its tab completer

src/main/java/net/knarcraft/paidsigns/command/RemoveConditionCommand.java

@@ -1,15 +1,40 @@
 package net.knarcraft.paidsigns.command;
 
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.utility.Tokenizer;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.List;
+
+/**
+ * A representation of the command for removing a condition from a sign
+ */
 public class RemoveConditionCommand implements CommandExecutor {
 
     @Override
     public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
-        return false;
+        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
+        int argumentSize = args[args.length - 1].isEmpty() ? arguments.size() : arguments.size() - 1;
+        if (argumentSize < 2) {
+            return false;
+        }
+
+        String name = arguments.get(0);
+        short line;
+        try {
+            line = Short.parseShort(arguments.get(1));
+        } catch (NumberFormatException exception) {
+            sender.sendMessage("Invalid line number given");
+            return false;
+        }
+        PaidSign sign = PaidSigns.getInstance().getSignManager().getPaidSign(name);
+        sign.removeCondition(line);
+        sender.sendMessage("Condition removed");
+        return true;
     }
 
 }