Doc: Remove index/toc view script

I see no reference to this file.

refs #4820
Modules: Call `Module::registerWebIntegration()' after including the run script

Routes added via a module's run script were not respected since
`Module::registerRoutes()' is called from `Module::registerWebIntegration()'.

refs #6303
Doc: Support `doc/module/:moduleName/chapter/:chapterName' URLs

refs #4820
Doc: Support `doc/icingaweb/chapter/:chapterName' URLs

refs #4820