Media Wiki:How can I hide the table of contents?

http://www.mediawiki.org/wiki/Manual:FAQ#How_can_I_hide_the_table_of_contents.3F

The table of contents (TOC) is automatically shown once there are four or more headings in the article. There are multiple ways to hide it.

For one page

Place the magic word __NOTOC__ into the page markup.

For all pages

Add the following rule to MediaWiki:Common.css:

.toc, #toc { display: none; }

A simpler and more efficient alternative is to edit the file /includes/parser/Parser.php, altering the line in the formatHeadings function the limit of 4 headings:

(($numMatches >= 4) || $this->mForceTocPosition);

to a higher value (e.g. 100). This way the table of contents will only be displayed in pages with 100 or more headings, OR in pages which contain one of the magic words __FORCETOC__ or __TOC__.

Per user

Users can also opt to have the table of contents hidden. This is a user preference, set in Special:Preferences.