Removed rogue print("max_csv_mb")

Found this while working on #2214

datasette/views/base.py

@@ -484,7 +484,6 @@ async def stream_csv(datasette, fetch_data, request, database):
 
     async def stream_fn(r):
         nonlocal data, trace
-        print("max_csv_mb", datasette.setting("max_csv_mb"))
         limited_writer = LimitedWriter(r, datasette.setting("max_csv_mb"))
         if trace:
             await limited_writer.write(preamble)