Revert of Improve CodeStubAssembler assert functionality

src/runtime/runtime-test.cc

Index: src/runtime/runtime-test.cc
diff --git a/src/runtime/runtime-test.cc b/src/runtime/runtime-test.cc
index aaa992daa6bd62854724a8051445d7cc3e5836c8..32819269792bc12eced2964aefebeb23a7a23eda 100644
--- a/src/runtime/runtime-test.cc
+++ b/src/runtime/runtime-test.cc
@@ -444,7 +444,7 @@
 
   OFStream os(stdout);
 #ifdef DEBUG
-  if (args[0]->IsString() && isolate->context() != nullptr) {
+  if (args[0]->IsString()) {
     // If we have a string, assume it's a code "marker"
     // and print some interesting cpu debugging info.
     JavaScriptFrameIterator it(isolate);