docs-rst: conf.py: remove kernel-documentation from LaTeX

There's no kernel-documentation.rst file at Documentation/
anymore. So, remove it from the list of LaTeX-generated
documents.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/conf.py

@@ -359,9 +359,7 @@ latex_documents = [
      'The kernel development community', 'manual'),
     ('input/index', 'linux-input.tex', 'The Linux input driver subsystem',
      'The kernel development community', 'manual'),
-    ('kernel-documentation', 'kernel-documentation.tex', 'The Linux Kernel Documentation',
-     'The kernel development community', 'manual'),
-    ('kernel-hacking/index', 'kernel-hacking.tex', 'Kernel Hacking Guides',
+    ('kernel-hacking/index', 'kernel-hacking.tex', 'Unreliable Guide To Hacking The Linux Kernel',
      'The kernel development community', 'manual'),
     ('media/index', 'media.tex', 'Linux Media Subsystem Documentation',
      'The kernel development community', 'manual'),