(2.6.0-test6-bk) DocBook: Kernel-api build fix

In the latest -bk tree for 2.6.0-test6, net/netsyms.c has been removed.
The kernel-api DocBook docs still refer to this file, and because this file is gone, "make htmldocs" and similar fails. Here's a patch to remove the reference and fix this docbook problem.

Daniel.

@@ -318,6 +318,5 @@
 <!-- Needs ksyms to list additional exported symbols, but no specific doc.
      docproc do not care about sgml commants.
 !Dkernel/ksyms.c
-!Dnet/netsyms.c
 -->
 </book>