[runtime] Fully remove RUNTIME_ASSERT for good.

src/base/logging.h

Index: src/base/logging.h
diff --git a/src/base/logging.h b/src/base/logging.h
index 45bc3c4cc6c3d5df4fd357ac59c0cf4a25c78c4a..50fceca88b3a6adf99835c49d5c3e4a9f04e8002 100644
--- a/src/base/logging.h
+++ b/src/base/logging.h
@@ -15,9 +15,6 @@
 extern "C" PRINTF_FORMAT(3, 4) V8_NORETURN
     void V8_Fatal(const char* file, int line, const char* format, ...);
 
-extern "C" void V8_RuntimeError(const char* file, int line,
-                                const char* message);
-
 // The FATAL, UNREACHABLE and UNIMPLEMENTED macros are useful during
 // development, but they should not be relied on in the final product.
 #ifdef DEBUG