Delete link to remove-project-artifact as is deprecated

src/site/apt/index.apt

@@ -63,8 +63,6 @@ Build Helper Maven Plugin
 
   * {{{./parse-version-mojo.html}build-helper:parse-version}} Parse the version into different properties.
 
-  * {{{./remove-project-artifact-mojo.html}build-helper:remove-project-artifact}} Remove project's artifacts from local repository.
-
   * {{{./reserve-network-port-mojo.html}build-helper:reserve-network-port}} Reserve a list of random and unused network ports.
 
   * {{{./local-ip-mojo.html}build-helper:local-ip}} Retrieve current host IP address.
@@ -85,7 +83,6 @@ Build Helper Maven Plugin
 
   Instructions on how to use the Build Helper Maven Plugin can be found on the {{{./usage.html}usage page}}.
 
-
 * Examples
 
   * {{{https://github.com/mojohaus/build-helper-maven-plugin/blob/master/src/it/reserve-ports/pom.xml} Reserve network port}}