Revert "Implement typed array constructors."

client/dom/generated/src/frog/Int8Array.dart

 
-class Int8Array extends ArrayBufferView implements List<int> native "Int8Array" {
-
-  factory Int8Array(int length) =>  _construct(length);
-
-  factory Int8Array.fromList(List<int> list) => _construct(list);
-
-  factory Int8Array.fromBuffer(ArrayBuffer buffer) => _construct(buffer);
-
-  static _construct(arg) native 'return new Int8Array(arg);';
+class Int8Array extends ArrayBufferView native "*Int8Array" {
 
   static final int BYTES_PER_ELEMENT = 1;
 
   int length;
 
-  int operator[](int index) native;
-
-  void operator[]=(int index, int value) native;
-
   Int8Array subarray(int start, [int end = null]) native;
 }