[PATCH] docs/completion.txt: drop dangling reference to completions-design.txt

[Brian Norris <briannorris@chromium.org>]

Per the original author, the proposed document was never deemed
necessary, and the important bits got merged into completion.txt. Let's
just stop confusing readers by pointing at a nonexistent doc.

Signed-off-by: Brian Norris <briannorris@chromium.org>
---

On Wed, Oct 26, 2016 at 10:11:26AM +0000, Nicholas Mc Guire wrote:
> On Tue, Oct 25, 2016 at 12:50:01PM -0700, Brian Norris wrote:
> > References in the introduced completion.txt doc have pointed lost souls
> > at an elusive completion-design.txt:
> > 
> >   "for details on completion design and implementation see
> >   completions-design.txt"
[...]
> If I remember correctly it was Jonathan Corbet that suggested to merge the
> two and atleast the usage part got merged in the current completion.txt 
> The path descriptions were not included as it was not clear how long such
> a path documentation would actually hold - so that was deliberately dropped
> The design goals/rational was more or less lost or not seen as relevant here
> as were the references/history and RT notes. As far as I remember it was a
> deliberate decision to drop these parts as they were not seen to be necessary.
> 
> Those missing bits could be merged into the current completion.txt I do not
> think it makes much sense to have it in a seperate file.

I'm not super interested in the missing bits -- just in de-obfuscating
the doc. How about this?

 Documentation/scheduler/completion.txt | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Documentation/scheduler/completion.txt b/Documentation/scheduler/completion.txt
index 2622bc7a188b..656cf803c006 100644
--- a/Documentation/scheduler/completion.txt
+++ b/Documentation/scheduler/completion.txt
@@ -25,8 +25,7 @@ struct completion that tells the waiting threads of execution if they
 can continue safely.
 
 As completions are scheduling related, the code is found in
-kernel/sched/completion.c - for details on completion design and
-implementation see completions-design.txt
+kernel/sched/completion.c.
 
 
 Usage:
-- 
2.8.0.rc3.226.g39d4020