[PATCH] I2C: Discard pointless comment in via686a

The simple patch below discards a comment in via686a referencing a file
that doesn't belong to the Linux tree. Now that I tell people not to do
that in my porting guide, we better follow our own advice.

drivers/i2c/chips/via686a.c

@@ -27,7 +27,6 @@
 /*
     Supports the Via VT82C686A, VT82C686B south bridges.
     Reports all as a 686A.
-    See doc/chips/via686a for details.
     Warning - only supports a single device.
 */