8213305: Fix legal headers in test/java/math

[Brian Burkhalter]

https://bugs.openjdk.java.net/browse/JDK-8213305 <https://bugs.openjdk.java.net/browse/JDK-8213305>

--- a/test/jdk/java/math/BigInteger/PrimeTest.java      Fri Nov 02 16:11:29 2018 +0000
+++ b/test/jdk/java/math/BigInteger/PrimeTest.java      Fri Nov 02 09:49:34 2018 -0700
@@ -4,9 +4,7 @@
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
+ * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

Thanks,

Brian