Remove pre-commit hook documentation

Summary: Ref T7674. This functionality has been removed.

Test Plan: Eyeball it.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Maniphest Tasks: T7674

Differential Revision: https://secure.phabricator.com/D12713

src/docs/user/userguide/arcanist.diviner

@@ -66,8 +66,6 @@ Arcanist has some advanced features as well, you can:
   - execute Conduit method calls with ##arc call-conduit##
   - create or update libphutil libraries with ##arc liberate##
   - activate tab completion with ##arc shell-complete##
-  - install arc as a pre-commit hook with ##arc svn-hook-pre-commit## or
-    ##arc git-hook-pre-receive##
   - ...or extend Arcanist and add new commands.
 
 Except where otherwise noted, these workflows are generally agnostic to the

src/docs/user/userguide/arcanist_hooks.diviner

@@ -1,41 +0,0 @@
-@title Arcanist User Guide: Repository Hooks
-@group userguide
-
-Describes how to set up Arcanist as an SVN pre-commit hook.
-
-NOTE: This whole thing might be a little shaky and take a touch of finesse.
-
-= Installing Arcanist SVN Hooks =
-
-You can install Arcanist as an SVN pre-commit hook, to reject commits which
-contain lint errors. The immediate value of this is that syntax errors won't
-be committable, but you can block other kinds of badness with appropriate lint
-engines.
-
-To install Arcanist as a pre-commit hook, add this to your svn/hooks/pre-commit:
-
-  #!/bin/sh
-  set -e # Exit with an error code if this fails.
-  /path/to/arcanist/bin/arc svn-hook-pre-commit $@ 1>&2
-
-Make sure you make this file executable, or you'll get an error for every commit
-with an unhelpful error message. You also need to specify the full path to PHP
-since SVN nukes ENV before executing scripts. Alternatively you can specify
-PATH explicitly.
-
-If your project is configured to run linters or lint engines which aren't part
-of Arcanist, specify where to load them from with ##--load-phutil-library##:
-
-  --load-phutil-library=/path/to/library/root
-
-Since SVN commit hooks run without access to a working copy, you'll need to keep
-one checked out somewhere and reference it with ##--load-phutil-library## if you
-build new linters or customize lint engines. For example, your hook might
-look like this:
-
-  #!/bin/sh
-  set -e # Exit with an error code if this fails.
-  /usr/local/bin/php -f /path/to/arcanist/bin/arc svn-hook-pre-commit \
-    --load-phutil-library=/path/to/custom/lint/engine \
-    --load-phutil-library=/path/to/custom/unittest/engine \
-    $@ 1>&2