diff --git a/src/parser/ArcanistBundle.php b/src/parser/ArcanistBundle.php
--- a/src/parser/ArcanistBundle.php
+++ b/src/parser/ArcanistBundle.php
@@ -9,7 +9,6 @@
   private $conduit;
   private $blobs = array();
   private $diskPath;
-  private $projectID;
   private $baseRevision;
   private $revisionID;
   private $encoding;
@@ -63,15 +62,6 @@
     return $this;
   }
 
-  public function setProjectID($project_id) {
-    $this->projectID = $project_id;
-    return $this;
-  }
-
-  public function getProjectID() {
-    return $this->projectID;
-  }
-
   public function setBaseRevision($base_revision) {
     $this->baseRevision = $base_revision;
     return $this;
@@ -178,7 +168,6 @@
     $obj = new ArcanistBundle();
     $obj->changes = $changes;
     $obj->diskPath = $path;
-    $obj->setProjectID($project_name);
     $obj->setBaseRevision($base_revision);
     $obj->setRevisionID($revision_id);
     $obj->setEncoding($encoding);
@@ -228,7 +217,6 @@
 
     $meta_info = array(
       'version'      => 5,
-      'projectName'  => $this->getProjectID(),
       'baseRevision' => $this->getBaseRevision(),
       'revisionID'   => $this->getRevisionID(),
       'encoding'     => $this->getEncoding(),
diff --git a/src/workflow/ArcanistExportWorkflow.php b/src/workflow/ArcanistExportWorkflow.php
--- a/src/workflow/ArcanistExportWorkflow.php
+++ b/src/workflow/ArcanistExportWorkflow.php
@@ -225,7 +225,6 @@
         }
 
         $bundle = ArcanistBundle::newFromChanges($changes);
-        $bundle->setProjectID($this->getWorkingCopy()->getProjectID());
         $bundle->setBaseRevision(
           $repository_api->getSourceControlBaseRevision());
         // NOTE: we can't get a revision ID for SOURCE_LOCAL
@@ -247,18 +246,6 @@
     }
 
     $try_encoding = nonempty($this->getArgument('encoding'), null);
-    if (!$try_encoding) {
-      try {
-        $project_info = $this->getConduit()->callMethodSynchronous(
-          'arcanist.projectinfo',
-          array(
-            'name' => $bundle->getProjectID(),
-          ));
-        $try_encoding = $project_info['encoding'];
-      } catch (ConduitClientException $e) {
-        $try_encoding = null;
-      }
-    }
 
     if ($try_encoding) {
       $bundle->setEncoding($try_encoding);
diff --git a/src/workflow/ArcanistWorkflow.php b/src/workflow/ArcanistWorkflow.php
--- a/src/workflow/ArcanistWorkflow.php
+++ b/src/workflow/ArcanistWorkflow.php
@@ -1173,7 +1173,6 @@
     $bundle->setConduit($conduit);
     // since the conduit method has changes, assume that these fields
     // could be unset
-    $bundle->setProjectID(idx($diff, 'projectName'));
     $bundle->setBaseRevision(idx($diff, 'sourceControlBaseRevision'));
     $bundle->setRevisionID(idx($diff, 'revisionID'));
     $bundle->setAuthorName(idx($diff, 'authorName'));