Remove -Xno-hidden-api-check flag.

Flag has been flipped to -Xhidden-api-check, so not needed anymore
for zygote testing.

Test: heap_test
Bug: 64382372

Change-Id: I904e3174fdd004c3352ac0c6fb5122ec03757da9
diff --git a/runtime/gc/heap_test.cc b/runtime/gc/heap_test.cc
index 9d8e5d2..6d426c2 100644
--- a/runtime/gc/heap_test.cc
+++ b/runtime/gc/heap_test.cc
@@ -81,7 +81,6 @@
   void SetUpRuntimeOptions(RuntimeOptions* options) {
     CommonRuntimeTest::SetUpRuntimeOptions(options);
     options->push_back(std::make_pair("-Xzygote", nullptr));
-    options->push_back(std::make_pair("-Xno-hidden-api-checks", nullptr));
   }
 };