Revert "Add @since 2.2."

This reverts commit 1d15692187c967f2bd76896ec4d4f761c65e7160.
diff --git a/commons-vfs2/src/main/java/org/apache/commons/vfs2/FileContent.java b/commons-vfs2/src/main/java/org/apache/commons/vfs2/FileContent.java
index 3e1b8f7..4f130c0 100644
--- a/commons-vfs2/src/main/java/org/apache/commons/vfs2/FileContent.java
+++ b/commons-vfs2/src/main/java/org/apache/commons/vfs2/FileContent.java
@@ -42,7 +42,6 @@
  * </p>
  *
  * @see FileObject#getContent
- * @since 2.2
  */
 public interface FileContent extends Closeable {