pkg/shelf removed unused dependency (mime)

pkg/shelf/CHANGELOG.md

+## 0.3.0+7
+
+* Removed unused dependency on the `mime` package.
+
 ## 0.3.0+6
 
 * Added a dependency on the `string_scanner` package.
 
 ## 0.3.0+5
 
 * Updated `pubspec` details for move to Dart SDK.
 
 ## 0.3.0 2014-03-25
 
 * `Response`
-  * **NEW!** `int get contentLength`
-  * **NEW!** `DateTime get expires`
-  * **NEW!** `DateTime get lastModified`
+    * **NEW!** `int get contentLength`
+    * **NEW!** `DateTime get expires`
+    * **NEW!** `DateTime get lastModified`
 * `Request`
-  * **BREAKING** `contentLength` is now read from `headers`. The constructor
-    argument has been removed.
-  * **NEW!** supports an optional `Stream<List<int>> body` constructor argument.
-  * **NEW!** `Stream<List<int>> read()` and
-    `Future<String> readAsString([Encoding encoding])`
-  * **NEW!** `DateTime get ifModifiedSince`
-  * **NEW!** `String get mimeType`
-  * **NEW!** `Encoding get encoding`
+    * **BREAKING** `contentLength` is now read from `headers`. The constructor
+      argument has been removed.
+    * **NEW!** supports an optional `Stream<List<int>> body` constructor argument.
+    * **NEW!** `Stream<List<int>> read()` and
+      `Future<String> readAsString([Encoding encoding])`
+    * **NEW!** `DateTime get ifModifiedSince`
+    * **NEW!** `String get mimeType`
+    * **NEW!** `Encoding get encoding`
 
 ## 0.2.0 2014-03-06
 
 * **BREAKING** Removed `Shelf` prefix from all classes.
 * **BREAKING** `Response` has drastically different constructors.
 * *NEW!* `Response` now accepts a body of either `String` or
   `Stream<List<int>>`.
 * *NEW!* `Response` now exposes `encoding` and `mimeType`.
 
 ## 0.1.0 2014-03-02
 
 * First reviewed release