Try this
HTML Code:
<a href="{vb:link thread, {vb:raw threadinfo}}" class="threadtitle" title="{vb:rawphrase view} {vb:raw lastpostinfo.lastthread}">{vb:raw lastpostinfo.trimthread}</a>
If you're wondering how this works, here's my best explanation.
The original code's href has 3 arguments as shown in the template: {vb:link thread}, {vb:raw threadinfo}, and {vb:raw pageinfo_newpost}. The first argument is a string that generates your base URL: 'http://myforum.com/forum/showthread.php' in this case. The second argument, an array passes the thread's info, ie: 'http://myforum.com/forum/showthread.php?
1234-Thread-Title'. Lastly, the third argument, another array passes the
&goto=newpost.
To put it all together, you write it like this {first_argument, {second_argument}, {third_argument}}. Notice the first argument's closing brace wraps around the other arguments. The change to get rid of the &goto=newpost is to remove the argument that holds it, in this case being the third.
Hope this (and my horrible explanation) was of help.