Remove unused logger objects

command/src/main/java/com/iluwatar/command/Goblin.java

@@ -23,16 +23,11 @@
 
 package com.iluwatar.command;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 /**
  * Goblin is the target of the spells.
  */
 public class Goblin extends Target {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(Goblin.class);
-
   public Goblin() {
     setSize(Size.NORMAL);
     setVisibility(Visibility.VISIBLE);

command/src/main/java/com/iluwatar/command/Wizard.java

@@ -25,16 +25,12 @@ package com.iluwatar.command;
 
 import java.util.Deque;
 import java.util.LinkedList;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 /**
  * Wizard is the invoker of the commands.
  */
 public class Wizard {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(Wizard.class);
-
   private final Deque<Runnable> undoStack = new LinkedList<>();
   private final Deque<Runnable> redoStack = new LinkedList<>();