[vm/kernel] Fix --no-link-platform option of gen_kernel tool

Change-Id: I917374540831f9d0d75af9f03730e06ecf26602f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149020
Reviewed-by: Jens Johansen <jensj@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
diff --git a/pkg/vm/lib/kernel_front_end.dart b/pkg/vm/lib/kernel_front_end.dart
index 7306657..044478e 100644
--- a/pkg/vm/lib/kernel_front_end.dart
+++ b/pkg/vm/lib/kernel_front_end.dart
@@ -274,9 +274,7 @@
 
   final IOSink sink = new File(outputFileName).openWrite();
   final BinaryPrinter printer = new BinaryPrinter(sink,
-      libraryFilter: minimalKernel
-          ? ((lib) => !results.loadedLibraries.contains(lib))
-          : null);
+      libraryFilter: (lib) => !results.loadedLibraries.contains(lib));
   printer.writeComponentFile(results.component);
   await sink.close();