Removed dependency on VRallev ECC25519 library

src/main/java/net/schmizz/sshj/common/Base64.java

@@ -1,18 +1,3 @@
-/*
- * Copyright (C)2009 - SSHJ Contributors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 package net.schmizz.sshj.common;
 
 
@@ -1742,4 +1727,4 @@ public class Base64 {
     private Base64() {
     }
 
-} // end class Base64
+} // end class Base64