NoopObserver
class torch.quantization.observer.NoopObserver(dtype=torch.float16, custom_op_name='')
Observer that doesn't do anything and just passes its configuration
   to the quantized module's ".from_float()".
Primarily used for quantization to float16 which doesn't require
   determining ranges.
Parameters:
      * dtype -- Quantized data type
  * **custom_op_name** -- (temporary) specify this observer for an
    operator that doesn't require any observation (Can be used in
    Graph Mode Passes for special case ops).
