diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 5de3ec71f2..8ec181f9fd 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -330,7 +330,6 @@ phutil_register_library_map(array(
     'DifferentialDependsOnField' => 'applications/differential/customfield/DifferentialDependsOnField.php',
     'DifferentialDiff' => 'applications/differential/storage/DifferentialDiff.php',
     'DifferentialDiffCreateController' => 'applications/differential/controller/DifferentialDiffCreateController.php',
-    'DifferentialDiffCreationRejectException' => 'applications/differential/exception/DifferentialDiffCreationRejectException.php',
     'DifferentialDiffEditor' => 'applications/differential/editor/DifferentialDiffEditor.php',
     'DifferentialDiffPHIDType' => 'applications/differential/phid/DifferentialDiffPHIDType.php',
     'DifferentialDiffProperty' => 'applications/differential/storage/DifferentialDiffProperty.php',
@@ -3381,7 +3380,6 @@ phutil_register_library_map(array(
       'PhabricatorDestructibleInterface',
     ),
     'DifferentialDiffCreateController' => 'DifferentialController',
-    'DifferentialDiffCreationRejectException' => 'Exception',
     'DifferentialDiffEditor' => 'PhabricatorApplicationTransactionEditor',
     'DifferentialDiffPHIDType' => 'PhabricatorPHIDType',
     'DifferentialDiffProperty' => 'DifferentialDAO',
diff --git a/src/applications/differential/exception/DifferentialDiffCreationRejectException.php b/src/applications/differential/exception/DifferentialDiffCreationRejectException.php
deleted file mode 100644
index e068084f0a..0000000000
--- a/src/applications/differential/exception/DifferentialDiffCreationRejectException.php
+++ /dev/null
@@ -1,3 +0,0 @@
-<?php
-
-final class DifferentialDiffCreationRejectException extends Exception {}