Revert "[llvm][docs] commit phabricator patch"

[nickdesaulniers]

Summary

This reverts commit ef4beb8bc76f9d40b7e680cb0c2c7474d80f5a77.

It also removes the prior note about needing to patch `arcanist`.

This is patch is no longer necessary:

1. arcanist came out of hibernation and updated to support PHP 8.1. https://github.com/phacility/arcanist/commits/master
2. llvm/llvm-project is moving to github pull requests starting Sept 1 (tomorrow). https://discourse.llvm.org/t/pull-request-migration-schedule/71595

Fixes: #64470

[nickdesaulniers]

• add fixes tag

[nickdesaulniers]

• fixes tag needs to be above diff revision tag?

[MaskRay]

llvm/docs/Phabricator.rst

39–40

Why do we use this fork?

https://github.com/phacility/arcanist has recently been updated?

[nickdesaulniers]

llvm/docs/Phabricator.rst

39–40

oh, sorry, yeah I should just delete all this.

[nickdesaulniers]

• also remove prior note about needing to patch arc

llvm/docs/Phabricator.rst

 the `Code Repository Browser`_.
 
 Requesting a review via the command line
 ----------------------------------------
 
 Phabricator has a tool called *Arcanist* to upload patches from
 the command line. To get you set up, follow the
 `Arcanist Quick Start`_ instructions.
 
-You may need to apply a fix to your arcanist repo in order to submit a patch:
-
-.. code-block:: console
-
-  % cd arcanist
-  % git am <path/to/llvm-project>/llvm/utils/phabricator/*.patch
-
 You can learn more about how to use arc to interact with
 Phabricator in the `Arcanist User Guide`_.
 The basic way of creating a revision for the current commit in your local
 repository is to run:
 
 ::
 
   arc diff HEAD~
 

llvm/utils/phabricator/0001-Fix-PHP-8.1-incompatibility-with-arc-patch-D-12345.patch

-From bb2e9a0394a48f4ef3576e8d91607e8129b2b716 Mon Sep 17 00:00:00 2001
-From: Nick Desaulniers <[e-mail]>
-Date: Fri, 8 Jul 2022 14:55:46 -0700
-Subject: [PATCH] Fix PHP 8.1 incompatibility with `arc patch D<12345>`
-
-Fixes the following observed error with PHP 8.1:
-
-  EXCEPTION: (RuntimeException) preg_match(): Passing null to parameter phacility#2 ($subject) of type string is deprecated at [<arcanist>/src/error/PhutilErrorHandler.php:261]
-  arcanist(head=master, ref.master=acec17af414f)
-    #0 PhutilErrorHandler::handleError(integer, string, string, integer)
-    phacility#1 preg_match(string, NULL, NULL) called at [<arcanist>/src/repository/api/ArcanistGitAPI.php:603]
-    phacility#2 ArcanistGitAPI::getCanonicalRevisionName(NULL) called at [<arcanist>/src/repository/api/ArcanistGitAPI.php:1146]
-    phacility#3 ArcanistGitAPI::hasLocalCommit(NULL) called at [<arcanist>/src/workflow/ArcanistPatchWorkflow.php:433]
-    phacility#4 ArcanistPatchWorkflow::run() called at [<arcanist>/src/workflow/ArcanistPatchWorkflow.php:398]
-    phacility#5 ArcanistPatchWorkflow::run() called at [<arcanist>/scripts/arcanist.php:427]
-
-Link: https://secure.phabricator.com/book/phabcontrib/article/contributing_code/
-Link: https://reviews.llvm.org/D129232#3634072
-Suggested-by: Yuanfang Chen <[e-mail]>
-Signed-off-by: Nick Desaulniers <[e-mail]>
----
- src/differential/ArcanistDifferentialDependencyGraph.php | 3 ++-
- src/lint/linter/ArcanistScriptAndRegexLinter.php         | 2 +-
- src/repository/api/ArcanistGitAPI.php                    | 3 ++-
- 3 files changed, 5 insertions(+), 3 deletions(-)
-
-diff --git a/src/differential/ArcanistDifferentialDependencyGraph.php b/src/differential/ArcanistDifferentialDependencyGraph.php
-index 64e2f9c71c20..fbc4e6594f0e 100644
---- a/src/differential/ArcanistDifferentialDependencyGraph.php
-+++ b/src/differential/ArcanistDifferentialDependencyGraph.php
-@@ -42,7 +42,8 @@ final class ArcanistDifferentialDependencyGraph extends AbstractDirectedGraph {
-     $edges = array();
-     foreach ($dependencies as $dependency) {
-       $dependency_revision = $this->getCommitHashFromDict($dependency);
--      if ($repository_api->hasLocalCommit($dependency_revision)) {
-+      if (phutil_nonempty_string($dependency_revision) &&
-+          $repository_api->hasLocalCommit($dependency_revision)) {
-         $edges[$dependency['phid']] = array();
-         continue;
-       }
-diff --git a/src/lint/linter/ArcanistScriptAndRegexLinter.php b/src/lint/linter/ArcanistScriptAndRegexLinter.php
-index 0c3d9d9a11ca..b9f6924ec997 100644
---- a/src/lint/linter/ArcanistScriptAndRegexLinter.php
-+++ b/src/lint/linter/ArcanistScriptAndRegexLinter.php
-@@ -338,7 +338,7 @@ final class ArcanistScriptAndRegexLinter extends ArcanistLinter {
-     }
- 
-     $line = idx($match, 'line');
--    if (strlen($line)) {
-+    if (phutil_nonempty_string($line) && strlen($line)) {
-       $line = (int)$line;
-       if (!$line) {
-         $line = 1;
-diff --git a/src/repository/api/ArcanistGitAPI.php b/src/repository/api/ArcanistGitAPI.php
-index 6c6d2ac42a19..13907d5634be 100644
---- a/src/repository/api/ArcanistGitAPI.php
-+++ b/src/repository/api/ArcanistGitAPI.php
-@@ -1143,7 +1143,8 @@ final class ArcanistGitAPI extends ArcanistRepositoryAPI {
- 
-   public function hasLocalCommit($commit) {
-     try {
--      if (!$this->getCanonicalRevisionName($commit)) {
-+      if (!phutil_nonempty_string($commit) ||
-+          !$this->getCanonicalRevisionName($commit)) {
-         return false;
-       }
-     } catch (CommandException $exception) {
--- 
-2.37.0.rc0.161.g10f37bed90-goog
-