remove Documentation/networking/net-modules.txt

According to git, the only one who touched this file during the last
5 years was me when removing drivers...

modinfo offers less ancient information.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Paul Gortmaker <paul.gortmaker@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Documentation/networking/00-INDEX

@@ -80,8 +80,6 @@ multicast.txt
 	- Behaviour of cards under Multicast
 ncsa-telnet
 	- notes on how NCSA telnet (DOS) breaks with MTU discovery enabled.
-net-modules.txt
-	- info and "insmod" parameters for all network driver modules.
 netdevices.txt
 	- info on network device driver functions exported to the kernel.
 olympic.txt