Removed duplicate entry (Google Java style guide)

free-programming-books.md

@@ -931,7 +931,6 @@
 * [Tutorial: Java, Maven 2, Eclipse & JSF](http://www.lulu.com/shop/arulkumaran-kumaraswamipillai-and-sivayini-arulkumaran/tutorial-java-maven-2-eclipse-jsf/ebook/product-1603040.html;jsessionid=E57B1E8662500F2ADF96D7B317769B6E) - Arulkumaran Kumaraswamipillai, Sivayini Arulkumaran
 * [Welcome to Java for Python Programmers](http://interactivepython.org/runestone/static/java4python/index.html) - Brad Miller
 * [Introduction to Computer science using Java](http://chortle.ccsu.edu/java5/index.html)
-* [Google's Java Style Guide](http://google-styleguide.googlecode.com/svn/trunk/javaguide.html)
 * [Processing XML with Java (A Guide to SAX, DOM, JDOM, JAXP, and TrAX)](http://www.cafeconleche.org/books/xmljava/) - Elliotte Rusty Harold