Remove gtest

It would be useful to be able to run libcper decoding unit tests without
needing a C compiler, as would be required if this were compiled to a
python module.

Change-Id: I183bc9ef048c336205186ea449e15b7766b19990
Signed-off-by: Ed Tanous <etanous@nvidia.com>
diff --git a/tests/base64_test.h b/tests/base64_test.h
new file mode 100644
index 0000000..9e44d6f
--- /dev/null
+++ b/tests/base64_test.h
@@ -0,0 +1,2 @@
+void test_base64_encode_good();
+void test_base64_decode_good();