how to get the logo to disappear

how to get the logo to disappear i have no need for it hope sum1 can help me :) 

pay for license to remove Boonex logo.

I think he's talking about the site logo, not the advertisement.

You have two options for removing the site logo:

1. upload a transparent image as the site logo; or
2. remove the logo-related code from the template.

Here's the method for the second option:

/templates/base/_sub_header.html:

Look for the following segment:

<div class="sys_main_logo">

<div class="sys_ml" style="width:__main_div_width__;">

<div class="sys_ml_wrapper">

<bx_injection:injection_logo_before />

__main_logo__

<bx_injection:injection_logo_after />

</div>

</div>

<bx_injection:banner_top />

</div>

and delete it.

You'll have to empty the /cache/ (except for the .htaccess file) and /cache_public/ directories for the changes to take effect.  It's recommended you make these changes outside of /base/ (within your own template's directory), as changes there may be overwritten after an upgrade.