Cap the number of FDs used by barback at 32.

pkg/barback/lib/src/utils.dart

Index: pkg/barback/lib/src/utils.dart
diff --git a/pkg/barback/lib/src/utils.dart b/pkg/barback/lib/src/utils.dart
index ef6a783053871d8b1c3f30f159f0f8358b78287d..a925bec73ae0acd70f4c16bd1bd8e0ba07d79a65 100644
--- a/pkg/barback/lib/src/utils.dart
+++ b/pkg/barback/lib/src/utils.dart
@@ -196,23 +196,3 @@ Stream futureStream(Future<Stream> future) {
   });
   return controller.stream;
 }
-
-// TODO(nweiz): Use a built-in function when issue 14244 is fixed.
-int get maxFileDescriptors {
-  if (_maxFileDescriptors != null) return _maxFileDescriptors;
-
-  // Running "sh -c ulimit -n" via the command line always reports "unlimited",
-  // even when that's clearly false. Instead we fall back on OS-based
-  // heuristics.
-  if (Platform.isWindows) {
-    _maxFileDescriptors = 512;
-    return _maxFileDescriptors;
-  } else if (Platform.isMacOS) {
-    _maxFileDescriptors = 16348;
-    return _maxFileDescriptors;
-  } else {
-    _maxFileDescriptors = 256;
-    return _maxFileDescriptors;
-  }
-}
-int _maxFileDescriptors;