remove some debug

Author: astei

proxy/src/main/java/com/velocitypowered/proxy/command/builtin/VelocityCommand.java

@@ -71,7 +71,6 @@
  */
 public final class VelocityCommand {
   private static final String USAGE = "/velocity <%s>";
-  private static final JoinConfiguration COMMA_JOINER = JoinConfiguration.commas(true);
 
   @SuppressWarnings("checkstyle:MissingJavadocMethod")
   public static BrigadierCommand create(final VelocityServer server) {