[ASan] fix the build - erase second main as we link all test sources together

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@159348 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/asan/tests/asan_noinst_test.cc b/lib/asan/tests/asan_noinst_test.cc
index 4aef960..dca1688 100644
--- a/lib/asan/tests/asan_noinst_test.cc
+++ b/lib/asan/tests/asan_noinst_test.cc
@@ -687,9 +687,3 @@
   for (size_t i = 0, n = pointers.size(); i < n; i++)
     free(pointers[i]);
 }
-
-int main(int argc, char **argv) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}