chore: remove leading newline from LICENSE (#938)

Co-authored-by: Christopher Wilcox <[email protected]>

Author: JustinBeckwith

synthtool/gcp/templates/java_library/LICENSE

@@ -1,4 +1,3 @@
-
                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/