Remove dead code: jniGetStackTrace.

Change-Id: I841da6eef183ddf13a9c058c204f4f244a389eb3
diff --git a/JNIHelp.cpp b/JNIHelp.cpp
index 4b77680..7fc166a 100644
--- a/JNIHelp.cpp
+++ b/JNIHelp.cpp
@@ -256,12 +256,7 @@
     return jniThrowException(env, "java/io/IOException", message);
 }
 
-void jniLogException(C_JNIEnv* env, int priority, const char* tag, jthrowable exception) {
-    std::string trace(jniGetStackTrace(env, exception));
-    __android_log_write(priority, tag, trace.c_str());
-}
-
-extern "C" std::string jniGetStackTrace(C_JNIEnv* env, jthrowable exception) {
+static std::string jniGetStackTrace(C_JNIEnv* env, jthrowable exception) {
     JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
 
     scoped_local_ref<jthrowable> currentException(env, (*env)->ExceptionOccurred(e));
@@ -289,6 +284,11 @@
     return trace;
 }
 
+void jniLogException(C_JNIEnv* env, int priority, const char* tag, jthrowable exception) {
+    std::string trace(jniGetStackTrace(env, exception));
+    __android_log_write(priority, tag, trace.c_str());
+}
+
 const char* jniStrError(int errnum, char* buf, size_t buflen) {
     // Note: glibc has a nonstandard strerror_r that returns char* rather than POSIX's int.
     // char *strerror_r(int errnum, char *buf, size_t n);
diff --git a/include/nativehelper/JNIHelp.h b/include/nativehelper/JNIHelp.h
index 8a630fe..b413fe9 100644
--- a/include/nativehelper/JNIHelp.h
+++ b/include/nativehelper/JNIHelp.h
@@ -33,12 +33,6 @@
 # define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
 #endif
 
-// TODO: the build system doesn't ensure the standard C++ library header files are on the include
-// path when compiling C++, and this file is included all over the place.
-#ifdef LIBCORE_CPP_JNI_HELPERS
-#include <string>
-#endif // LIBCORE_CPP_JNI_HELPERS
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -178,16 +172,6 @@
     jniLogException(&env->functions, priority, tag, exception);
 }
 
-#ifdef LIBCORE_CPP_JNI_HELPERS
-
-extern "C" std::string jniGetStackTrace(C_JNIEnv* env, jthrowable exception);
-
-inline std::string jniGetStackTrace(JNIEnv* env, jthrowable exception = NULL) {
-  return jniGetStackTrace(&env->functions, exception);
-}
-
-#endif // LIBCORE_CPP_JNI_HELPERS
-
 #endif
 
 /* Logging macros.