Get rid of all the library tags.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1584623002 .
diff --git a/lib/path.dart b/lib/path.dart
index 93fe67e..25236ea 100644
--- a/lib/path.dart
+++ b/lib/path.dart
@@ -44,8 +44,6 @@
 ///
 /// This will join "directory" and "file.txt" using the Windows path separator,
 /// even when the program is run on a POSIX machine.
-library path;
-
 import 'src/context.dart';
 import 'src/style.dart';
 
diff --git a/lib/src/characters.dart b/lib/src/characters.dart
index ff196a6..7dddb2f 100644
--- a/lib/src/characters.dart
+++ b/lib/src/characters.dart
@@ -3,8 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// This library contains character-code definitions.
-library path.characters;
-
 const PLUS = 0x2b;
 const MINUS = 0x2d;
 const PERIOD = 0x2e;
diff --git a/lib/src/context.dart b/lib/src/context.dart
index a6a1cb2..8819706 100644
--- a/lib/src/context.dart
+++ b/lib/src/context.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.context;
-
 import 'characters.dart' as chars;
 import 'internal_style.dart';
 import 'style.dart';
diff --git a/lib/src/internal_style.dart b/lib/src/internal_style.dart
index 549f95b..84bc67e 100644
--- a/lib/src/internal_style.dart
+++ b/lib/src/internal_style.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.internal_style;
-
 import 'context.dart';
 import 'style.dart';
 
diff --git a/lib/src/parsed_path.dart b/lib/src/parsed_path.dart
index d37e2d3..a3d68c7 100644
--- a/lib/src/parsed_path.dart
+++ b/lib/src/parsed_path.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.parsed_path;
-
 import 'internal_style.dart';
 import 'style.dart';
 
diff --git a/lib/src/path_exception.dart b/lib/src/path_exception.dart
index 49bd268..55f5be3 100644
--- a/lib/src/path_exception.dart
+++ b/lib/src/path_exception.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.path_exception;
-
 /// An exception class that's thrown when a path operation is unable to be
 /// computed accurately.
 class PathException implements Exception {
diff --git a/lib/src/style.dart b/lib/src/style.dart
index e0e0e01..342a102 100644
--- a/lib/src/style.dart
+++ b/lib/src/style.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.style;
-
 import 'context.dart';
 import 'style/posix.dart';
 import 'style/url.dart';
diff --git a/lib/src/style/posix.dart b/lib/src/style/posix.dart
index 74aeb4c..6f183fc 100644
--- a/lib/src/style/posix.dart
+++ b/lib/src/style/posix.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.style.posix;
-
 import '../characters.dart' as chars;
 import '../parsed_path.dart';
 import '../internal_style.dart';
diff --git a/lib/src/style/url.dart b/lib/src/style/url.dart
index 255f22a..659275c 100644
--- a/lib/src/style/url.dart
+++ b/lib/src/style/url.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.style.url;
-
 import '../characters.dart' as chars;
 import '../internal_style.dart';
 
diff --git a/lib/src/style/windows.dart b/lib/src/style/windows.dart
index f38efa5..8223486 100644
--- a/lib/src/style/windows.dart
+++ b/lib/src/style/windows.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.style.windows;
-
 import '../characters.dart' as chars;
 import '../internal_style.dart';
 import '../parsed_path.dart';
diff --git a/lib/src/utils.dart b/lib/src/utils.dart
index e320749..64e471e 100644
--- a/lib/src/utils.dart
+++ b/lib/src/utils.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.utils;
-
 import 'characters.dart' as chars;
 
 /// Returns whether [char] is the code for an ASCII letter (uppercase or
diff --git a/test/posix_test.dart b/test/posix_test.dart
index afd6b94..7c5aaf4 100644
--- a/test/posix_test.dart
+++ b/test/posix_test.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.test.posix_test;
-
 import 'package:test/test.dart';
 import 'package:path/path.dart' as path;
 
diff --git a/test/utils.dart b/test/utils.dart
index 7d917a0..ae3ea46 100644
--- a/test/utils.dart
+++ b/test/utils.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.test.utils;
-
 import "package:test/test.dart";
 import "package:path/path.dart" as path;
 
diff --git a/test/windows_test.dart b/test/windows_test.dart
index 717043d..8b83c03 100644
--- a/test/windows_test.dart
+++ b/test/windows_test.dart
@@ -2,8 +2,6 @@
 // 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.
 
-library path.test.windows_test;
-
 import 'package:test/test.dart';
 import 'package:path/path.dart' as path;