Remove sourceforge logo, we will not host the website there

Signed-off-by: Michal Čihař <michal@cihar.com>

pmaweb/templates/base.html

@@ -79,7 +79,6 @@ <h1><a href="{% url 'home' %}" rel="home"><span id="logo">phpMyAdmin</span></a>
     <li><a href="{% url 'donate' %}" rel="payment" title="Support phpMyAdmin by donating money!">Donate</a></li>
     <li><a href="{% url 'search' %}" title="Search for phpMyAdmin related questions">Search</a></li>
     <li><a href="{% url 'about-website' %}" title="Information about website">About</a></li>
-    <li class="logo"><a href="http://sourceforge.net/projects/phpmyadmin"><img src="http://sflogo.sourceforge.net/sflogo.php?group_id=23067&amp;type=10" width="80" height="15" alt="Get phpMyAdmin at SourceForge.net. Fast, secure and Free Open Source software downloads" /></a></li>
     <li class="logo"><a class="FlattrButton" style="display:none;" rev="flattr;button:compact;" href="http://www.phpmyadmin.net/"></a></li>
     <li class="logo"><a href="http://google.com/+phpmyadmin" style="text-decoration: none;"><img src="https://ssl.gstatic.com/images/icons/gplus-16.png" width="16" height="16" style="border: 0;" alt="Google+"/></a></li>
     <li class="logo"><a href="http://twitter.com/phpmya" style="text-decoration: none;"><img src="{% static 'images/Twitter_logo_blue_20x16.png' %}" width="20" height="16" style="border: 0;" alt="Twitter"/></a></li>