Remove dummy plugin

[stweil]

It is not needed anywhere.

Signed-off-by: Stefan Weil [email protected]

[stweil]

Would it be better to have the plugins directory as part of the site configuration which currently is below the theme directory? Maybe the directory structure should look like this:

(PalMA root)
|
site
|
+----+--- ...
|    |
demo ub-mannheim
|    |
...  +------+--- ...
     |      |
     a3     a5
     |
     +------+
     |      |
     theme  plugins
     |      |
     ...    ...

[dennmuel]

The dummy was once intended to show that people could insert their own php-plugins here. I'm fine with the deletion. Perhaps we could add some words about plugin coding in the documentation and/or a small readme in the plugins folder.
Directory structure generally could be discussed in #113 .