manual: Remove raid6 link.

kernel.org returns 301 (Forbidden by robots.txt).

Suggested-by: checklink(1)

diff --git a/web/manual.md b/web/manual.md
index 3dfba712fb75d3f662ebc3da6e37be1fc4475cd0..ed880d897d060770632294095247503d77b412d2 100644 (file)
--- a/web/manual.md
+++ b/web/manual.md
@@ -2330,10 +2330,6 @@ Application web pages
 External documentation
 ----------------------
 
-- [The mathematics of
-Raid6](https://www.kernel.org/pub/linux/kernel/people/hpa/raid6.pdf)
-by H. Peter Anvin
-
 - [Effective Erasure Codes for reliable Computer Communication
 Protocols](http://info.iet.unipi.it/~luigi/fec_ccr.ps.gz) by Luigi
 Rizzo