diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -532,7 +532,6 @@
     'DifferentialRevisionHeraldField' => 'applications/differential/herald/DifferentialRevisionHeraldField.php',
     'DifferentialRevisionHeraldFieldGroup' => 'applications/differential/herald/DifferentialRevisionHeraldFieldGroup.php',
     'DifferentialRevisionIDCommitMessageField' => 'applications/differential/field/DifferentialRevisionIDCommitMessageField.php',
-    'DifferentialRevisionIDField' => 'applications/differential/customfield/DifferentialRevisionIDField.php',
     'DifferentialRevisionLandController' => 'applications/differential/controller/DifferentialRevisionLandController.php',
     'DifferentialRevisionListController' => 'applications/differential/controller/DifferentialRevisionListController.php',
     'DifferentialRevisionListView' => 'applications/differential/view/DifferentialRevisionListView.php',
@@ -5199,7 +5198,6 @@
     'DifferentialRevisionHeraldField' => 'HeraldField',
     'DifferentialRevisionHeraldFieldGroup' => 'HeraldFieldGroup',
     'DifferentialRevisionIDCommitMessageField' => 'DifferentialCommitMessageField',
-    'DifferentialRevisionIDField' => 'DifferentialCustomField',
     'DifferentialRevisionLandController' => 'DifferentialController',
     'DifferentialRevisionListController' => 'DifferentialController',
     'DifferentialRevisionListView' => 'AphrontView',
diff --git a/src/applications/differential/conduit/DifferentialParseCommitMessageConduitAPIMethod.php b/src/applications/differential/conduit/DifferentialParseCommitMessageConduitAPIMethod.php
--- a/src/applications/differential/conduit/DifferentialParseCommitMessageConduitAPIMethod.php
+++ b/src/applications/differential/conduit/DifferentialParseCommitMessageConduitAPIMethod.php
@@ -37,11 +37,9 @@
 
     $errors = $parser->getErrors();
 
-    // grab some extra information about the Differential Revision: field...
-    $revision_id_field = new DifferentialRevisionIDField();
     $revision_id_value = idx(
       $field_map,
-      $revision_id_field->getFieldKeyForConduit());
+      DifferentialRevisionIDCommitMessageField::FIELDKEY);
     $revision_id_valid_domain = PhabricatorEnv::getProductionURI('');
 
     return array(
diff --git a/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php b/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php
--- a/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php
+++ b/src/applications/differential/config/PhabricatorDifferentialConfigOptions.php
@@ -49,8 +49,6 @@
       new DifferentialLintField(),
       new DifferentialUnitField(),
       new DifferentialRevertPlanField(),
-
-      new DifferentialRevisionIDField(),
     );
 
     $default_fields = array();
diff --git a/src/applications/differential/customfield/DifferentialRevisionIDField.php b/src/applications/differential/customfield/DifferentialRevisionIDField.php
deleted file mode 100644
--- a/src/applications/differential/customfield/DifferentialRevisionIDField.php
+++ /dev/null
@@ -1,85 +0,0 @@
-<?php
-
-final class DifferentialRevisionIDField
-  extends DifferentialCustomField {
-
-  private $revisionID;
-
-  public function getFieldKey() {
-    return 'differential:revision-id';
-  }
-
-  public function getFieldKeyForConduit() {
-    return 'revisionID';
-  }
-
-  public function getFieldName() {
-    return pht('Differential Revision');
-  }
-
-  public function getFieldDescription() {
-    return pht(
-      'Ties commits to revisions and provides a permanent link between them.');
-  }
-
-  public function canDisableField() {
-    return false;
-  }
-
-  public function shouldAppearInCommitMessage() {
-    return true;
-  }
-
-  public function parseValueFromCommitMessage($value) {
-    // If the value is just "D123" or similar, parse the ID from it directly.
-    $value = trim($value);
-    $matches = null;
-    if (preg_match('/^[dD]([1-9]\d*)\z/', $value, $matches)) {
-      return (int)$matches[1];
-    }
-
-    // Otherwise, try to extract a URI value.
-    return self::parseRevisionIDFromURI($value);
-  }
-
-  public function renderCommitMessageValue(array $handles) {
-    $id = coalesce($this->revisionID, $this->getObject()->getID());
-    if (!$id) {
-      return null;
-    }
-    return PhabricatorEnv::getProductionURI('/D'.$id);
-  }
-
-  public function readValueFromCommitMessage($value) {
-    $this->revisionID = $value;
-  }
-
-  private static function parseRevisionIDFromURI($uri_string) {
-    $uri = new PhutilURI($uri_string);
-    $path = $uri->getPath();
-
-    $matches = null;
-    if (preg_match('#^/D(\d+)$#', $path, $matches)) {
-      $id = (int)$matches[1];
-
-      $prod_uri = new PhutilURI(PhabricatorEnv::getProductionURI('/D'.$id));
-
-      // Make sure the URI is the same as our URI. Basically, we want to ignore
-      // commits from other Phabricator installs.
-      if ($uri->getDomain() == $prod_uri->getDomain()) {
-        return $id;
-      }
-
-      $allowed_uris = PhabricatorEnv::getAllowedURIs('/D'.$id);
-
-      foreach ($allowed_uris as $allowed_uri) {
-        if ($uri_string == $allowed_uri) {
-          return $id;
-        }
-      }
-    }
-
-    return null;
-  }
-
-}