diff --git a/resources/sql/autopatches/20150503.repositorysymbols.2.php b/resources/sql/autopatches/20150503.repositorysymbols.2.php
index eda6b5ed4b..a3a380dadd 100644
--- a/resources/sql/autopatches/20150503.repositorysymbols.2.php
+++ b/resources/sql/autopatches/20150503.repositorysymbols.2.php
@@ -1,26 +1,29 @@
 <?php
 
-$projects = id(new PhabricatorRepositoryArcanistProjectQuery())
-  ->setViewer(PhabricatorUser::getOmnipotentUser())
-  ->needRepositories(true)
-  ->execute();
-
 $table = new PhabricatorRepositorySymbol();
 $conn_w = $table->establishConnection('w');
 
+$projects = queryfx_all(
+  $conn_w,
+  'SELECT * FROM %T',
+  'repository_arcanistproject');
+
 foreach ($projects as $project) {
-  $repo = $project->getRepository();
+  $repo = id(new PhabricatorRepositoryQuery())
+    ->setViewer(PhabricatorUser::getOmnipotentUser())
+    ->withIDs(array($project['repository']))
+    ->executeOne();
 
   if (!$repo) {
     continue;
   }
 
-  echo pht("Migrating symbols for '%s' project...\n", $project->getName());
+  echo pht("Migrating symbols for '%s' project...\n", $project['name']);
 
   queryfx(
     $conn_w,
     'UPDATE %T SET repositoryPHID = %s WHERE arcanistProjectID = %d',
     $table->getTableName(),
     $repo->getPHID(),
-    $project->getID());
+    $project['id']);
 }
diff --git a/resources/sql/patches/131.migraterevisionquery.php b/resources/sql/patches/131.migraterevisionquery.php
index 316c7cdee2..c3f97a04a5 100644
--- a/resources/sql/patches/131.migraterevisionquery.php
+++ b/resources/sql/patches/131.migraterevisionquery.php
@@ -1,35 +1,3 @@
 <?php
 
-$table = new DifferentialRevision();
-$table->openTransaction();
-$table->beginReadLocking();
-$conn_w = $table->establishConnection('w');
-
-echo pht('Migrating revisions')."\n";
-do {
-  $revisions = $table->loadAllWhere('branchName IS NULL LIMIT 1000');
-
-  foreach ($revisions as $revision) {
-    echo '.';
-
-    $diff = $revision->loadActiveDiff();
-    if (!$diff) {
-      continue;
-    }
-
-    $branch_name = $diff->getBranch();
-    $arc_project_phid = $diff->getArcanistProjectPHID();
-
-    queryfx(
-      $conn_w,
-      'UPDATE %T SET branchName = %s, arcanistProjectPHID = %s WHERE id = %d',
-      $table->getTableName(),
-      $branch_name,
-      $arc_project_phid,
-      $revision->getID());
-  }
-} while (count($revisions) == 1000);
-
-$table->endReadLocking();
-$table->saveTransaction();
-echo "\n".pht('Done.')."\n";
+// This migration has been dropped, see T7604 for details.