[runtime] Fully remove RUNTIME_ASSERT for good.

src/base/logging.cc

Index: src/base/logging.cc
diff --git a/src/base/logging.cc b/src/base/logging.cc
index ebab129f93630eac5d6f54b2ee16a709928f91ea..a2688c9c9aefb1f566f048e79c7f6ec4c0f9db16 100644
--- a/src/base/logging.cc
+++ b/src/base/logging.cc
@@ -115,14 +115,3 @@ extern "C" void V8_Fatal(const char* file, int line, const char* format, ...) {
   fflush(stderr);
   v8::base::OS::Abort();
 }
-
-extern "C" void V8_RuntimeError(const char* file, int line,
-                                const char* message) {
-  fflush(stdout);
-  fflush(stderr);
-  v8::base::OS::PrintError("\n\n#\n# Runtime error in %s, line %d\n# ", file,
-                           line);
-  v8::base::OS::PrintError("\n# %s\n", message);
-  v8::base::DumpBacktrace();
-  fflush(stderr);
-}