Revert of [WASM] Implements catch for the wasm low level exception mechanism.

src/runtime/runtime-wasm.cc

Index: src/runtime/runtime-wasm.cc
diff --git a/src/runtime/runtime-wasm.cc b/src/runtime/runtime-wasm.cc
index 0662f3d7089727692975499aa7da068694ec166f..d41be53a4e365f3ffb90bdcf16790534a4251fae 100644
--- a/src/runtime/runtime-wasm.cc
+++ b/src/runtime/runtime-wasm.cc
@@ -129,16 +129,5 @@
   return isolate->Throw(*isolate->factory()->NewNumberFromInt(thrown_value));
 }
 
-RUNTIME_FUNCTION(Runtime_WasmGetCaughtExceptionValue) {
-  HandleScope scope(isolate);
-  DCHECK_EQ(1, args.length());
-  Object* exception = args[0];
-  // The unwinder will only deliver exceptions to wasm if the exception is a
-  // Number or a Smi (which we have just converted to a Number.) This logic
-  // lives in Isolate::is_catchable_by_wasm(Object*).
-  CHECK(exception->IsNumber());
-  return exception;
-}
-
 }  // namespace internal
 }  // namespace v8