[native_assets_cli] Fix system libraries and add documentation - fix test 2

Author: dcharkes

pkgs/native_assets_builder/test_data/system_library/lib/memory_executable.dart

@@ -9,9 +9,3 @@ external Pointer malloc(int size);
 
 @Native<Void Function(Pointer)>()
 external void free(Pointer pointer);
-
-@Native<Pointer Function(Size)>(symbol: 'CoTaskMemAlloc')
-external Pointer coTaskMemAlloc(int cb);
-
-@Native<Void Function(Pointer)>(symbol: 'CoTaskMemFree')
-external void coTaskMemFree(Pointer pv);

pkgs/native_assets_builder/test_data/system_library/test/memory_test.dart

@@ -12,11 +12,7 @@ import 'package:test/test.dart';
 
 void main() {
   test('executable', () {
-    if (Platform.isWindows) {
-      final pointer = executable.coTaskMemAlloc(8);
-      expect(pointer, isNot(nullptr));
-      executable.coTaskMemFree(pointer);
-    } else {
+    if (!Platform.isWindows) {
       final pointer = executable.malloc(8);
       expect(pointer, isNot(nullptr));
       executable.free(pointer);