Delete duplicate declared objects:ClubbedTroll

Trolls should not be re-declared: if I had a troll called Zac, one day I
gave him a weapon.I can not because he now has a weapon called him
Trundle. He is still Zac.

Author: OCNYang

decorator/README.md

@@ -105,9 +105,9 @@ troll.attack(); // The troll tries to grab you!
 troll.fleeBattle(); // The troll shrieks in horror and runs away!
 
 // change the behavior of the simple troll by adding a decorator
-Troll clubbed = new ClubbedTroll(troll);
-clubbed.attack(); // The troll tries to grab you! The troll swings at you with a club!
-clubbed.fleeBattle(); // The troll shrieks in horror and runs away!
+troll = new ClubbedTroll(troll);
+troll.attack(); // The troll tries to grab you! The troll swings at you with a club!
+troll.fleeBattle(); // The troll shrieks in horror and runs away!
 ```
 
 ## Applicability

decorator/src/main/java/com/iluwatar/decorator/App.java

@@ -57,9 +57,9 @@ public static void main(String[] args) {
 
     // change the behavior of the simple troll by adding a decorator
     LOGGER.info("A troll with huge club surprises you.");
-    Troll clubbed = new ClubbedTroll(troll);
-    clubbed.attack();
-    clubbed.fleeBattle();
-    LOGGER.info("Clubbed troll power {}.\n", clubbed.getAttackPower());
+    troll = new ClubbedTroll(troll);
+    troll.attack();
+    troll.fleeBattle();
+    LOGGER.info("Clubbed troll power {}.\n", troll.getAttackPower());
   }
 }