Internal change

PiperOrigin-RevId: 620287585

Author: lauraharker

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

@@ -505,6 +505,7 @@ protected PassListBuilder getChecks() {
   protected PassListBuilder getOptimizations() {
     PassListBuilder passes = new PassListBuilder(options);
     if (options.isPropertyRenamingOnlyCompilationMode()) {
+      passes.maybeAdd(removeUnnecessarySyntheticExterns);
       TranspilationPasses.addTranspilationRuntimeLibraries(passes);
       passes.maybeAdd(closureProvidesRequires);
       passes.maybeAdd(processDefinesOptimize);