Revert "Fix dlsym() to take into account RTLD_GLOBAL/LOCAL"

This reverts commit c85e82dde5c4b2accc50a9e17740b9005dfbae6a.

Bug: 18222321
Bug: 18211780
Change-Id: I32f4048bd5ea85dc8a3dfccce8cf141b241ab692
diff --git a/tests/libs/dlopen_testlib_simple.cpp b/tests/libs/dlopen_testlib_simple.cpp
index 3226955..bf750b2 100644
--- a/tests/libs/dlopen_testlib_simple.cpp
+++ b/tests/libs/dlopen_testlib_simple.cpp
@@ -19,6 +19,6 @@
 
 uint32_t dlopen_testlib_taxicab_number = 1729;
 
-extern "C" bool dlopen_testlib_simple_func() {
+bool dlopen_testlib_simple_func() {
   return true;
 }