Revert "Rename internal library dart:_collection-dev to dart:_internal."

sdk/lib/typed_data/typed_data.dart

Index: sdk/lib/typed_data/typed_data.dart
diff --git a/sdk/lib/typed_data/typed_data.dart b/sdk/lib/typed_data/typed_data.dart
index 9d37eb6830760eb3f83699c60121a9228a7be644..db860c55f623a06f9ad325123dee6dce07574869 100644
--- a/sdk/lib/typed_data/typed_data.dart
+++ b/sdk/lib/typed_data/typed_data.dart
@@ -5,8 +5,6 @@
 library dart.typed_data;
 
 import 'dart:collection';
-import 'dart:_collection-dev';
-import 'dart:math' show Random;
 
 /**
  * A sequence of bytes underlying a typed data object.
@@ -18,7 +16,6 @@ abstract class ByteBuffer {
    * Returns the length of this byte buffer, in bytes.
    */
   int get lengthInBytes;
-
 }