Remove barback from the repo.

sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart

Index: sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
diff --git a/sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart b/sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
index f7a0dc528e016df3feab57bdec185ad87ab36d31..33b1bf76431903a5d513c7ee192d423520a6a622 100644
--- a/sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
+++ b/sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
@@ -95,10 +95,8 @@ PackageGraph _loadPackageGraph() {
 
   loadPackage(packageName) {
     if (packages.containsKey(packageName)) return;
-    packages[packageName] = new Package.load(
-        packageName,
-        p.join(pkgPath, packageName),
-        systemCache.sources);
+    packages[packageName] =
+        new Package.load(packageName, packagePath(packageName), systemCache.sources);
     for (var dep in packages[packageName].dependencies) {
       loadPackage(dep.name);
     }