Don't bother with very old versions (#59)

diff --git a/src/site/apt/index.apt.vm b/src/site/apt/index.apt.vm
index b4b26d4..5b731c4 100644
--- a/src/site/apt/index.apt.vm
+++ b/src/site/apt/index.apt.vm
@@ -36,7 +36,7 @@
  Thus, this allows the separation of resources for the main source code and its
  unit tests.
 
- Starting with version 2.3 this plugin uses the {{{http://maven.apache.org/shared/maven-filtering/}Maven Filtering}}
+ This plugin uses the {{{http://maven.apache.org/shared/maven-filtering/}Maven Filtering}}
  shared component for filtering resources.
 
 * Goals Overview