remove '@APinote' javadoc tag

Author: siordache

src/main/java/org/kohsuke/github/GHTreeBuilder.java

@@ -105,7 +105,6 @@ public GHTreeBuilder shaEntry(String path, String sha, boolean executable) {
      * @param executable
      *            the executable
      * @return the gh tree builder
-     * @apiNote It seems that GitHub no longer supports the 'content' parameter.
      * @deprecated use {@link #add(String, String, boolean)} or {@link #add(String, byte[], boolean)} instead.
      */
     @Deprecated