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Edit The WordPress Meta Widget
Do you really want the link to WordPress sitting in your Admin/Meta widget? If not, open up the default-widgets.php file in the wp-includes directory.
Make a copy of it.
Go to the <ul> tag which is around line 295 and remove this <li> code:
<li><a href=”http://wordpress.org/” title=”<?php echo esc_attr(__(‘Powered by WordPress, state-of-the-art semantic personal publishing platform.’)); ?>”>WordPress.org</a></li>
You can trim out more if you want, before saving the file.

Edit the WordPress Meta widget
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