Remove probably misleading mce=0

See: https://forums.whonix.org/t/kernel-hardening-security-misc/7296/493

Author: brandsimon

guides/linux-hardening.html

@@ -580,12 +580,6 @@ <h4 id="boot-kernel"><a href="#boot-kernel">2.3.1 Kernel self-protection</a></h4
       strictest option. This implies <code>module.sig_enforce=1</code>.
     </p>
 
-    <pre><code>mce=0</code></pre>
-
-    <p>
-      This causes the kernel to panic on uncorrectable errors in ECC memory which could be exploited. This is unnecessary for systems without ECC memory.
-    </p>
-
     <pre><code>quiet loglevel=0</code></pre>
 
     <p>