Revert "Support relative paths in path dependencies."

utils/pub/lock_file.dart

Index: utils/pub/lock_file.dart
diff --git a/utils/pub/lock_file.dart b/utils/pub/lock_file.dart
index 594e523d357641cf24a96418e556f147e427e909..23e709993e18d1bb8499f3ba5844b6364f9e214e 100644
--- a/utils/pub/lock_file.dart
+++ b/utils/pub/lock_file.dart
@@ -5,7 +5,6 @@
 library lock_file;
 
 import 'dart:json' as json;
-import 'io.dart';
 import 'package.dart';
 import 'source_registry.dart';
 import 'utils.dart';
@@ -22,19 +21,8 @@ class LockFile {
   LockFile.empty()
     : packages = <String, PackageId>{};
 
-  /// Loads a lockfile from [filePath].
-  factory LockFile.load(String filePath, SourceRegistry sources) {
-    return LockFile._parse(filePath, readTextFile(filePath), sources);
-  }
-
-  /// Parses a lockfile whose text is [contents].
-  factory LockFile.parse(String contents, SourceRegistry sources) {
-    return LockFile._parse(null, contents, sources);
-  }
-
   /// Parses the lockfile whose text is [contents].
-  static LockFile _parse(String filePath, String contents,
-      SourceRegistry sources) {
+  factory LockFile.parse(String contents, SourceRegistry sources) {
     var packages = <String, PackageId>{};
 
     if (contents.trim() == '') return new LockFile.empty();
@@ -66,8 +54,7 @@ class LockFile {
           throw new FormatException('Package $name is missing a description.');
         }
         var description = spec['description'];
-        description = source.parseDescription(filePath, description,
-            fromLockFile: true);
+        source.validateDescription(description, fromLockFile: true);
 
         var id = new PackageId(name, source, version, description);