Revert "[libFuzzer] Support using libc++"

This reverts commit r322604: test is failing for standalone compiler-rt.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@322689 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerMain.cpp b/FuzzerMain.cpp
index bf8875a..af86572 100644
--- a/FuzzerMain.cpp
+++ b/FuzzerMain.cpp
@@ -16,6 +16,6 @@
 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
 }  // extern "C"
 
-__attribute__ ((visibility("default"))) int main(int argc, char **argv) {
+int main(int argc, char **argv) {
   return fuzzer::FuzzerDriver(&argc, &argv, LLVMFuzzerTestOneInput);
 }