Don't polute the page with useless javascript

#### This is a quality control patch

When #4694 was committed there were some things done wrong due to
1. There were some inconsistencies in the admin area namely  #4694 and #4788
2. The initial proposal actually needed javascript to function.

As none of the above exist anymore we don’t need the javascript part as well.

#### Results
There shouldn’t be any visual or functional changes

#### Test
Log in to the admin area
Create a new article
Is the joomla icon and the cog icon on the navigation disabled and not functional? 
If yes test is successful