Remove obsolete global V8::IsRunning() predicate.

test/cctest/test-log.cc

Index: test/cctest/test-log.cc
diff --git a/test/cctest/test-log.cc b/test/cctest/test-log.cc
index 6bf56f0fa40395405586c842d197e4ff56cf508c..daa8178af9ec11a60d7069a9ba4bf76ec42840f9 100644
--- a/test/cctest/test-log.cc
+++ b/test/cctest/test-log.cc
@@ -427,9 +427,6 @@ TEST(EquivalenceOfLoggingAndTraversal) {
   // it launches a new cctest instance for every test. To be sure that launching
   // cctest manually also works, please be sure that no tests below
   // are using V8.
-  //
-  // P.S. No, V8 can't be re-initialized after disposal, see include/v8.h.
-  CHECK(!i::V8::IsRunning());
 
   // Start with profiling to capture all code events from the beginning.
   ScopedLoggerInitializer initialize_logger;