Simplify
diff --git a/src/main/java/org/apache/commons/lang3/exception/ExceptionUtils.java b/src/main/java/org/apache/commons/lang3/exception/ExceptionUtils.java
index 218fab9..08f038a 100644
--- a/src/main/java/org/apache/commons/lang3/exception/ExceptionUtils.java
+++ b/src/main/java/org/apache/commons/lang3/exception/ExceptionUtils.java
@@ -238,9 +238,8 @@ public static Throwable getRootCause(final Throwable throwable) {
      * @since 2.2
      */
     public static String getRootCauseMessage(final Throwable throwable) {
-        Throwable root = getRootCause(throwable);
-        root = root == null ? throwable : root;
-        return getMessage(root);
+        final Throwable root = getRootCause(throwable);
+        return getMessage(root == null ? throwable : root);
     }
 
     /**