Revert "Support relative paths in path dependencies."

utils/tests/pub/install/path/relative_path_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import '../../../../../pkg/path/lib/path.dart' as path;
-
 import '../../../../pub/exit_codes.dart' as exit_codes;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
-  integration("can use relative path", () {
-    dir("foo", [
-      libDir("foo"),
-      libPubspec("foo", "0.0.1")
-    ]).scheduleCreate();
-
+  integration('path dependencies cannot use relative paths', () {
     dir(appPath, [
       pubspec({
         "name": "myapp",
         "dependencies": {
           "foo": {"path": "../foo"}
         }
       })
     ]).scheduleCreate();
 
-    schedulePub(args: ["install"],
-        output: new RegExp(r"Dependencies installed!$"));
-
-    dir(packagesPath, [
-      dir("foo", [
-        file("foo.dart", 'main() => "foo";')
-      ])
-    ]).scheduleValidate();
-  });
-
-  integration("path is relative to containing pubspec", () {
-    dir("relative", [
-      dir("foo", [
-        libDir("foo"),
-        libPubspec("foo", "0.0.1", deps: [
-          {"path": "../bar"}
-        ])
-      ]),
-      dir("bar", [
-        libDir("bar"),
-        libPubspec("bar", "0.0.1")
-      ])
-    ]).scheduleCreate();
-
-    dir(appPath, [
-      pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": {"path": "../relative/foo"}
-        }
-      })
-    ]).scheduleCreate();
-
-    schedulePub(args: ["install"],
-        output: new RegExp(r"Dependencies installed!$"));
-
-    dir(packagesPath, [
-      dir("foo", [
-        file("foo.dart", 'main() => "foo";')
-      ]),
-      dir("bar", [
-        file("bar.dart", 'main() => "bar";')
-      ])
-    ]).scheduleValidate();
+    schedulePub(args: ['install'],
+        error: new RegExp("Path dependency for package 'foo' must be an "
+                          "absolute path. Was '../foo'."),
+        exitCode: exit_codes.DATA);
   });
 }