Stop writes to the old Relationship table

Summary: Ref T1279. The new stuff seems stable, so stop writes to the old tables.

Test Plan:
  - Added and removed reviewers.
  - Grepped for `::RELATIONSHIP_TABLE` to verify we really have no more reads.
  - Grepped for `::RELATION_REVIEWER`.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1279

Differential Revision: https://secure.phabricator.com/D7360

src/applications/differential/editor/DifferentialRevisionEditor.php

@@ -618,15 +618,6 @@ final class DifferentialRevisionEditor extends PhabricatorEditor {
 
     $reviewers = $revision->getReviewers();
 
-    // This is here until the new way proves stable enough
-    // See https://secure.phabricator.com/T1279
-    self::alterReviewers(
-      $revision,
-      $reviewers,
-      $remove_phids,
-      $add_phids,
-      $actor->getPHID());
-
     $editor = id(new PhabricatorEdgeEditor())
       ->setActor($actor);
 
@@ -679,18 +670,6 @@ final class DifferentialRevisionEditor extends PhabricatorEditor {
     $reviewer_phid,
     $status) {
 
-    $reviewers = $revision->getReviewers();
-    if (!in_array($reviewer_phid, $reviewers)) {
-      // This is here until the new way proves stable enough
-      // See https://secure.phabricator.com/T1279
-      self::alterReviewers(
-        $revision,
-        $reviewers,
-        array(),
-        array($reviewer_phid),
-        $actor->getPHID());
-    }
-
     $options = array(
       'data' => array(
         'status' => $status
@@ -712,25 +691,6 @@ final class DifferentialRevisionEditor extends PhabricatorEditor {
       ->save();
   }
 
-  /**
-   * @deprecated
-   */
-  private static function alterReviewers(
-    DifferentialRevision $revision,
-    array $stable_phids,
-    array $rem_phids,
-    array $add_phids,
-    $reason_phid) {
-
-    return self::alterRelationships(
-      $revision,
-      $stable_phids,
-      $rem_phids,
-      $add_phids,
-      $reason_phid,
-      DifferentialRevision::RELATION_REVIEWER);
-  }
-
   private static function alterRelationships(
     DifferentialRevision $revision,
     array $stable_phids,