Revert r13292. This is when the first failure showed up on dartc, but dartc

lib/core/function.dart

Index: lib/core/function.dart
===================================================================
--- lib/core/function.dart	(revision 13328)
+++ lib/core/function.dart	(working copy)
@@ -4,30 +4,5 @@
 
 // Dart core library.
 
-/**
- * Super-type of all function types.
- *
- * A function value, or an instance of a class with a "call" method, is a
- * subtype of a function type, and as such, a subtype of [Function].
- */
 abstract class Function {
-  /**
-   * Dynamically call [function] with the specified arguments.
-   *
-   * Acts the same as calling function with positional arguments
-   * corresponding to the elements of [positionalArguments] and
-   * named arguments corresponding to the elements of [namedArguments].
-   *
-   * This includes giving the same errors if [function] isn't callable or
-   * if it expects different parameters.
-   *
-   * Example: [: Function.apply(foo, [1,2,3], {"f": 4, "g": 5}) :] gives
-   * exactly the same result as [: foo(1, 2, 3, f: 4, g: 5) :].
-   *
-   * If [positionalArguments] is null, it's considered an empty list.
-   * If [namedArguments] is omitted or null, it is considered an empty map.
-   */
-  external static apply(Function function,
-                        List positionalArguments,
-                        [Map<String,Dynamic> namedArguments]);
 }