flac dev - May 2017 - Any way to suppress VORBIS_COMMENT (or at least the vendor string)?

I am encoding 12000-channel instrument data using the FLAC library, 
which works exceptionally well. However, as a result of the very large 
number of channels and the small recording length (~18k samples per 
channel), I am encoding all the channels separately and the "reference 
libFLAC X.Y.Z YYYYMMDD" string ends up being more than 10% of the 
compressed data. Is there any way to remove it? I could not find any 
obvious path to do this in the standard API.
-Nathan