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
@@ -886,7 +886,6 @@
     'HeraldEngine' => 'applications/herald/engine/HeraldEngine.php',
     'HeraldInvalidActionException' => 'applications/herald/engine/exception/HeraldInvalidActionException.php',
     'HeraldInvalidConditionException' => 'applications/herald/engine/exception/HeraldInvalidConditionException.php',
-    'HeraldInvalidFieldException' => 'applications/herald/engine/exception/HeraldInvalidFieldException.php',
     'HeraldManageGlobalRulesCapability' => 'applications/herald/capability/HeraldManageGlobalRulesCapability.php',
     'HeraldManiphestTaskAdapter' => 'applications/herald/adapter/HeraldManiphestTaskAdapter.php',
     'HeraldNewController' => 'applications/herald/controller/HeraldNewController.php',
@@ -3983,7 +3982,6 @@
     'HeraldEditLogQuery' => 'PhabricatorOffsetPagedQuery',
     'HeraldInvalidActionException' => 'Exception',
     'HeraldInvalidConditionException' => 'Exception',
-    'HeraldInvalidFieldException' => 'Exception',
     'HeraldManageGlobalRulesCapability' => 'PhabricatorPolicyCapability',
     'HeraldManiphestTaskAdapter' => 'HeraldAdapter',
     'HeraldNewController' => 'HeraldController',
diff --git a/src/applications/herald/engine/exception/HeraldInvalidFieldException.php b/src/applications/herald/engine/exception/HeraldInvalidFieldException.php
deleted file mode 100644
--- a/src/applications/herald/engine/exception/HeraldInvalidFieldException.php
+++ /dev/null
@@ -1,3 +0,0 @@
-<?php
-
-final class HeraldInvalidFieldException extends Exception {}