You need to go to
AdminCP> Style manager > Your Style > Editor Templates > Editor_Toolbar_ on
and look for the following, which is near the end
PHP Code:
<if condition="$show['code_bbcode']">
<td><div class="imagebutton" id="{$editorid}_cmd_wrap0_code"><img src="$stylevar[imgdir_editor]/code.gif" width="21" height="20" alt="$vbphrase[wrap_code_tags]" /></div></td>
</if>
<if condition="$show['html_bbcode']">
<td><div class="imagebutton" id="{$editorid}_cmd_wrap0_html"><img src="$stylevar[imgdir_editor]/html.gif" width="21" height="20" alt="$vbphrase[wrap_html_tags]" /></div></td>
</if>
<if condition="$show['php_bbcode']">
<td><div class="imagebutton" id="{$editorid}_cmd_wrap0_php"><img src="$stylevar[imgdir_editor]/php.gif" width="21" height="20" alt="$vbphrase[wrap_php_tags]" /></div></td>
If you delete this it should take out the Code icons from your editor, You can always replace them at a later date
REMEMBER to copy your Editor_Toolbar_ on code into word or notepad first incase you make a mistake, you be able to cut and paste it back
have fun