Remove deprecated code

pubspec.lock

Index: pubspec.lock
diff --git a/pubspec.lock b/pubspec.lock
index 669449e2c13544b619a8d58d15d13793007ef58a..6f0fa5d6923cdb36ca8536d4842aaa95821764f9 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -6,7 +6,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.28.0-alpha.1"
+    version: "0.28.1"
   archive:
     description:
       name: archive
@@ -138,7 +138,7 @@ packages:
       name: isolate
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.2"
+    version: "0.2.3"
   js:
     description:
       name: js
@@ -157,6 +157,12 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.12.0+2"
+  meta:
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
   mime:
     description:
       name: mime
@@ -174,7 +180,7 @@ packages:
       name: package_resolver
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.0.2"
   path:
     description:
       name: path
@@ -210,7 +216,7 @@ packages:
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.5+2"
+    version: "0.6.5+3"
   shelf_packages_handler:
     description:
       name: shelf_packages_handler
@@ -270,7 +276,7 @@ packages:
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.15+3"
+    version: "0.12.15+6"
   typed_data:
     description:
       name: typed_data