diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 18991ce577..5dd0a535e0 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -176,8 +176,6 @@ phutil_register_library_map(array(
     'AuditConduitAPIMethod' => 'applications/audit/conduit/AuditConduitAPIMethod.php',
     'AuditQueryConduitAPIMethod' => 'applications/audit/conduit/AuditQueryConduitAPIMethod.php',
     'AuthManageProvidersCapability' => 'applications/auth/capability/AuthManageProvidersCapability.php',
-    'CalendarColors' => 'applications/calendar/constants/CalendarColors.php',
-    'CalendarConstants' => 'applications/calendar/constants/CalendarConstants.php',
     'CalendarTimeUtil' => 'applications/calendar/util/CalendarTimeUtil.php',
     'CalendarTimeUtilTestCase' => 'applications/calendar/__tests__/CalendarTimeUtilTestCase.php',
     'CelerityAPI' => 'applications/celerity/CelerityAPI.php',
@@ -3445,7 +3443,6 @@ phutil_register_library_map(array(
     'AuditConduitAPIMethod' => 'ConduitAPIMethod',
     'AuditQueryConduitAPIMethod' => 'AuditConduitAPIMethod',
     'AuthManageProvidersCapability' => 'PhabricatorPolicyCapability',
-    'CalendarColors' => 'CalendarConstants',
     'CalendarTimeUtilTestCase' => 'PhabricatorTestCase',
     'CelerityManagementMapWorkflow' => 'CelerityManagementWorkflow',
     'CelerityManagementWorkflow' => 'PhabricatorManagementWorkflow',
diff --git a/src/applications/calendar/constants/CalendarColors.php b/src/applications/calendar/constants/CalendarColors.php
deleted file mode 100644
index e7bd792e0b..0000000000
--- a/src/applications/calendar/constants/CalendarColors.php
+++ /dev/null
@@ -1,29 +0,0 @@
-<?php
-
-final class CalendarColors extends CalendarConstants {
-
-  const COLOR_RED = 'red';
-  const COLOR_ORANGE = 'orange';
-  const COLOR_YELLOW = 'yellow';
-  const COLOR_GREEN = 'green';
-  const COLOR_BLUE = 'blue';
-  const COLOR_SKY = 'sky';
-  const COLOR_INDIGO = 'indigo';
-  const COLOR_VIOLET = 'violet';
-  const COLOR_GREY = 'grey';
-
-  public static function getColors() {
-    return array(
-      self::COLOR_SKY,
-      self::COLOR_GREEN,
-      self::COLOR_VIOLET,
-      self::COLOR_ORANGE,
-      self::COLOR_BLUE,
-      self::COLOR_INDIGO,
-      self::COLOR_RED,
-      self::COLOR_YELLOW,
-      self::COLOR_GREY,
-    );
-  }
-
-}
diff --git a/src/applications/calendar/constants/CalendarConstants.php b/src/applications/calendar/constants/CalendarConstants.php
deleted file mode 100644
index 4a67720c18..0000000000
--- a/src/applications/calendar/constants/CalendarConstants.php
+++ /dev/null
@@ -1,3 +0,0 @@
-<?php
-
-abstract class CalendarConstants {}