Remove note on very old version (#1589)

The mentioned issue was close 1.5 years ago, so it shouldn't be relevant any more.

Co-authored-by: Holly Sweeney <77758406+holly1238@users.noreply.github.com>

Author: felixdivo

recipes_source/recipes/dynamic_quantization.py

@@ -220,9 +220,6 @@ def print_size_of_model(model, label=""):
 q=print_size_of_model(quantized_lstm,"int8")
 print("{0:.2f} times smaller".format(f/q))
 
-# note that this value is wrong in PyTorch 1.4 due to https://github.com/pytorch/pytorch/issues/31468
-# this will be fixed in 1.5 with https://github.com/pytorch/pytorch/pull/31540
-
 
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 # 4. Look at Latency