Lint fixes

Author: kevmoo

canonical_json/test/canonical_json_test.dart

@@ -16,7 +16,6 @@ import 'dart:convert';
 import 'dart:math';
 import 'package:canonical_json/canonical_json.dart';
 import 'package:test/test.dart';
-import 'package:unorm_dart/unorm_dart.dart' show nfc;
 
 void main() {
   void testValue(String name, Object value) => test(name, () {

chunked_stream/example/main.dart

@@ -49,7 +49,7 @@ void main() async {
     final lengthBytes = await iterator.read(4);
 
     // We have EOF if there is no more bytes
-    if (lengthBytes.length == 0) {
+    if (lengthBytes.isEmpty) {
       break;
     }