Remove long deprecated diagnostic group FEATURES_NOT_SUPPORTED_BY_PASS.

PiperOrigin-RevId: 700500008

Author: concavelenz

src/com/google/javascript/jscomp/DiagnosticGroups.java

@@ -175,9 +175,6 @@ public static DiagnosticGroup forName(String name) {
       DiagnosticGroups.registerGroup(
           "untranspilableFeatures", ReportUntranspilableFeatures.UNTRANSPILABLE_FEATURE_PRESENT);
 
-  public static final DiagnosticGroup FEATURES_NOT_SUPPORTED_BY_PASS =
-      DiagnosticGroups.registerDeprecatedGroup("featuresNotSupportedByPass");
-
   public static final DiagnosticGroup MODULE_LOAD =
       DiagnosticGroups.registerGroup(
           "moduleLoad",