test: Correct ineffectual WithOrVersion from transactions_tests

WithOrVersion uses | to combine the versions, and | with 0 is a no-op.

Instead I run it with PROTOCOL_VERSION and 0 separately, as the original
code only tested PROTOCOL_VERSION but apparently only intended to test
version 0.

Introduced in ab48c5e721
Last updated 81e3228fcb

src/streams.h

@@ -64,12 +64,6 @@ public:
     size_t size() const { return stream->size(); }
 };
 
-template<typename S>
-OverrideStream<S> WithOrVersion(S* s, int nVersionFlag)
-{
-    return OverrideStream<S>(s, s->GetType(), s->GetVersion() | nVersionFlag);
-}
-
 /* Minimal stream for overwriting and/or appending to an existing byte vector
  *
  * The referenced vector will grow as necessary