pytorch

c4a90ca1 - Revert D15477933: [pt1][quant] remove quantize_linear and dequantize from Tensor method

Revert D15477933: [pt1][quant] remove quantize_linear and dequantize from Tensor method Differential Revision: D15477933 Original commit changeset: c8aa81f681e0 fbshipit-source-id: ec494fbbab72e20da262bdd8657887e1fdd173cb