moved missing method to Java 9 GCMFipsUtil class.

Author: dghgit

tls/src/main/jdk1.9/org/bouncycastle/tls/crypto/impl/jcajce/GCMUtil.java

@@ -16,9 +16,4 @@ static boolean isGCMParameterSpecAvailable()
     {
         return true;
     }
-
-    static AEADNonceGeneratorFactory getDefaultFipsGCMNonceGeneratorFactory()
-    {
-        return null;
-    }
 }