formats: Remove problem causing part of duplicate detection in h26x

There are legitimate situations where different NAL units get same
timestamp. This commit removes discarding for Single NAL units because
of this situation.

src/formats/h26x.cc

@@ -628,7 +628,10 @@ rtp_error_t uvgrtp::formats::h26x::packet_handler(int rce_flags, uvgrtp::frame::
     else if (frag_type == uvgrtp::formats::FRAG_TYPE::FT_NOT_FRAG) { // Single NAL unit
 
         // TODO: Check if previous dependencies have been sent forward
-        completed_ts_[frame->header.timestamp] = std::chrono::high_resolution_clock::now();
+
+        // TODO: We should detect duplicate packets, but there are legitimate situations
+        //  where single NAL units have same timestamps
+        //completed_ts_[frame->header.timestamp] = std::chrono::high_resolution_clock::now();
 
         // nothing special needs to be done, just possibly add start codes back
         prepend_start_code(rce_flags, out);