[debugger] remove GeneratorMirror.prototype.context().

src/runtime/runtime-generator.cc

Index: src/runtime/runtime-generator.cc
diff --git a/src/runtime/runtime-generator.cc b/src/runtime/runtime-generator.cc
index f7be0eb60b75ad963ac6d3db3c2622f4f50c1261..602d7a7eae89de7e9af7f291ece58f367cb493ac 100644
--- a/src/runtime/runtime-generator.cc
+++ b/src/runtime/runtime-generator.cc
@@ -148,16 +148,6 @@ RUNTIME_FUNCTION(Runtime_GeneratorGetFunction) {
 }
 
 
-// Returns context of generator activation.
-RUNTIME_FUNCTION(Runtime_GeneratorGetContext) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
-
-  return generator->context();
-}
-
-
 // Returns receiver of generator activation.
 RUNTIME_FUNCTION(Runtime_GeneratorGetReceiver) {
   HandleScope scope(isolate);