remove JNIHelp.h from sqlite_jni.c

sqlite_jni.c doesn't need JNIHelp.h to compile, remove it to avoid
having to pull in liblog to satisify the LOG?_EX definitions.

Change-Id: Iadceea110c0c7e273518e140b898ee4f610a6c67
diff --git a/src/main/native/sqlite_jni.c b/src/main/native/sqlite_jni.c
index 6e5648c..7dcc05f 100644
--- a/src/main/native/sqlite_jni.c
+++ b/src/main/native/sqlite_jni.c
@@ -1,4 +1,3 @@
-#include "JNIHelp.h"
 #include "sqlite_jni_defs.h"
 
 #include <stdlib.h>