Delete empty <script></script> tags after transformation

[dmorejon]

After transforming scripts, you could end up with an HTML file that has one or more instances of <script></script>.
For example, since description("Test description"); calls are removed, if you had HTML that looked like:
<script>description("Test description");</script> the transformed HTML would be left with
<script></script>.

It would be nice (and likely not very difficult) to remove these empty tags in injectScripts.js.
Although, some subtleties include: make sure that the scriptCount is incremented and the scripts array is handled correctly after deletion, that traversal continues correctly after deletion, and that the <script> tag is truly empty including no attributes within the tag.