After installing the Account Pictures extension on my test forum, I had realized that there was no way to remove the photo from being displayed. Here is a quick fix for those interested.

1. Open the default.php file and find the line with if( $this->PostBackAction == 'ProcessAccountPictures' ) {


2. Below that line insert the following:
   

   if (isset($_REQUEST['btnRemoveAccountPicture'])) {
   	$User->Picture = '';
   	$UserManager->SaveIdentity($User);	
   }
   
   if (isset($_REQUEST['btnRemoveAccountIcon'])) {
   	$User->Icon = '';
   	$UserManager->SaveIdentity($User);
   }
   



3. Find the line <input type="file" name="AccountIcon" value="" class="SmallInput" style="width: 300px;" id="txtAccountIcon" /> and add <input type="submit" name="btnRemoveAccountIcon" value="Remove" />


4. Find the line <input type="file" name="AccountPicture" value="" class="SmallInput" style="width: 300px;" id="txtAccountPicture" /> and add <input type="submit" name="btnRemoveAccountPicture" value="Remove" />


5. Save and upload!

I am still new to the whole coding style of Vanilla so this may not be the prettiest way, but nonetheless, it's a temporary fix.

(By the way, this does not remove the image itself from the server, it only removes it from displaying.)

Oh... I can't believe I missed that.