Shorten

This was more or less already said in the previous sentence with 'only'.

wiki/src/support/faq.mdwn

@@ -500,8 +500,7 @@ Can I use <span class="command">ping</span> in Tails?
 -----------------------------------------------------
 
 It is impossible to use <span class="command">ping</span> in Tails, because <span class="command">ping</span> uses the ICMP protocol and Tor
-can only transport TCP connections. Therefore it can't be redirected through the Tor
-network.
+can only transport TCP connections.
 
 <a id="software"></a>