Minor dead code elimination (from #96)

Author: cowtowncoder

src/main/java/com/fasterxml/uuid/impl/RandomBasedGenerator.java

@@ -23,12 +23,6 @@
  */
 public class RandomBasedGenerator extends NoArgGenerator
 {
-    /**
-     * Default shared random number generator, used if no random number generator
-     * is explicitly specified for instance
-     */
-    protected static Random _sharedRandom = null;
-
     /**
      * Random number generator that this generator uses.
      */
@@ -51,10 +45,8 @@ public RandomBasedGenerator(Random rnd)
     {
         if (rnd == null) {
             rnd = LazyRandom.sharedSecureRandom();
-            _secureRandom = true;
-        } else {
-            _secureRandom = (rnd instanceof SecureRandom);
         }
+        _secureRandom = (rnd instanceof SecureRandom);
         _random = rnd;
     }