Remove "Select All" time from visual page

The line `Time taken to Select All (should be <50ms):` was false
positives in image diff. To counter act that we now log the selection
time instead.
diff --git a/test/visual.html b/test/visual.html
index acfa902..a5918b5 100644
--- a/test/visual.html
+++ b/test/visual.html
@@ -161,8 +161,6 @@
 

 <p id="selection-tests"><span class="mathquill-text-field different-bgcolor">lolwut $a^2 + b^2 = c^2$. $\sqrt{ \left( \frac{1}{2} \right) }$.  Also, awesomesauce: $\int_0^1 \sin x dx.</span>

 

-<p>Time taken to Select All (should be &lt;50ms): <span id="selection-performance"></span>

-

 <p>Even in IE&lt;9, the background color of the parens and square root radical should be the background color of the selection.

 

 <h3>Dynamic mathquill-ification</h3>

@@ -331,7 +329,7 @@
     $('#selection-tests .mathquill-text-field').each(function() {

       var start = +new Date;

       $('textarea', this).focus().trigger({type: 'keydown', ctrlKey: true, which: 65});

-      $('#selection-performance').html(new Date - start);

+      console.log('Time taken to Select All (should be &lt;50ms):',new Date - start);

     });

   });

 };