Documentation: drop Linux Source Driver from kernel-docs references

Dropping LSD (Linux Source Driver) since it hasn't been available
for a long time.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/kernel-docs.txt

@@ -620,17 +620,6 @@
        (including this document itself) have been moved there, and might
        be more up to date than the web version.
 
-     * Name: "Linux Source Driver"
-       URL: http://lsd.linux.cz
-       Keywords: Browsing source code.
-       Description: "Linux Source Driver (LSD) is an application, which
-       can make browsing source codes of Linux kernel easier than you can
-       imagine. You can select between multiple versions of kernel (e.g.
-       0.01, 1.0.0, 2.0.33, 2.0.34pre13, 2.0.0, 2.1.101 etc.). With LSD
-       you can search Linux kernel (fulltext, macros, types, functions
-       and variables) and LSD can generate patches for you on the fly
-       (files, directories or kernel)".
-
      * Name: "Linux Kernel Source Reference"
        Author: Thomas Graichen.
        URL: http://marc.info/?l=linux-kernel&m=96446640102205&w=4