[runtime] Fully remove RUNTIME_ASSERT for good.

test/mjsunit/es6/reflect-define-property.js

Index: test/mjsunit/es6/reflect-define-property.js
diff --git a/test/mjsunit/es6/reflect-define-property.js b/test/mjsunit/es6/reflect-define-property.js
index d62a93490e3e2337e81f86f02db4272603593440..8eb3f6580ef582777d20d2478edc8c13d67c3162 100644
--- a/test/mjsunit/es6/reflect-define-property.js
+++ b/test/mjsunit/es6/reflect-define-property.js
@@ -441,28 +441,6 @@ try {
 }
 
 
-// Test runtime calls to DefineAccessorPropertyUnchecked - make sure we don't
-// crash.
-try {
-  %DefineAccessorPropertyUnchecked(0, 0, 0, 0, 0);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-try {
-  %DefineAccessorPropertyUnchecked(null, null, null, null, null);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
-// Defining properties null should fail even when we have
-// other allowed values
-try {
-  %DefineAccessorPropertyUnchecked(null, 'foo', func, null, 0);
-} catch (e) {
-  assertTrue(/illegal access/.test(e));
-}
-
 // Test that all possible differences in step 6 in DefineOwnProperty are
 // exercised, i.e., any difference in the given property descriptor and the
 // existing properties should not return true, but throw an error if the