Remove StringUtils#join in favor of String#join (Java 8)

src/main/java/fr/xephi/authme/command/CommandUtils.java

@@ -1,7 +1,6 @@
 package fr.xephi.authme.command;
 
 import com.google.common.collect.Lists;
-import fr.xephi.authme.util.StringUtils;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -25,18 +24,6 @@ public final class CommandUtils {
         return command.getArguments().size();
     }
 
-    /**
-     * Provide a textual representation of a list of labels to show it as a command. For example, a list containing
-     * the items ["authme", "register", "player"] will return "authme register player".
-     *
-     * @param labels The labels to format
-     *
-     * @return The space-separated labels
-     */
-    public static String labelsToString(Iterable<String> labels) {
-        return StringUtils.join(" ", labels);
-    }
-
     public static String constructCommandPath(CommandDescription command) {
         StringBuilder sb = new StringBuilder();
         String prefix = "/";

src/main/java/fr/xephi/authme/command/executable/authme/AccountsCommand.java

@@ -6,7 +6,6 @@ import fr.xephi.authme.command.ExecutableCommand;
 import fr.xephi.authme.datasource.DataSource;
 import fr.xephi.authme.output.MessageKey;
 import fr.xephi.authme.util.BukkitService;
-import fr.xephi.authme.util.StringUtils;
 import org.bukkit.command.CommandSender;
 
 import javax.inject.Inject;
@@ -70,7 +69,7 @@ public class AccountsCommand implements ExecutableCommand {
 
     private static void outputAccountsList(CommandSender sender, String playerName, List<String> accountList) {
         sender.sendMessage("[AuthMe] " + playerName + " has " + accountList.size() + " accounts.");
-        String message = "[AuthMe] " + StringUtils.join(", ", accountList) + ".";
+        String message = "[AuthMe] " + String.join(", ", accountList) + ".";
         sender.sendMessage(message);
     }
 }

src/main/java/fr/xephi/authme/command/help/HelpProvider.java

@@ -187,7 +187,7 @@ public class HelpProvider implements SettingsDependent {
         }
 
         lines.add(ChatColor.GOLD + "Commands:");
-        String parentCommandPath = CommandUtils.labelsToString(parentLabels);
+        String parentCommandPath = String.join(" ", parentLabels);
         for (CommandDescription child : command.getChildren()) {
             lines.add(" /" + parentCommandPath + " " + child.getLabels().get(0)
                 + ChatColor.GRAY + ChatColor.ITALIC + ": " + child.getDescription());