Remove duplicate calculation of output shape (#26684)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26684
Output heights and widths are already calculated by conv_p. Remove the duplicate calculation.
ghstack-source-id: 90633432
Test Plan:
buck test mode/dev caffe2/test:quantized
```
Summary (total time 18.69s):
PASS: 45
FAIL: 0
SKIP: 10
caffe2/test:quantized - test_qadd_scalar_relu (test_quantized.TestQuantizedOps)
caffe2/test:quantized - test_equal (test_quantized.TestQuantizedOps)
caffe2/test:quantized - test_qnnpack_add (test_quantized.TestQNNPackOps)
caffe2/test:quantized - test_qconv_unpack (test_quantized.TestQNNPackOps)
caffe2/test:quantized - test_qlinear_unpack (test_quantized.TestQNNPackOps)
caffe2/test:quantized - test_compare_tensor_scalar (test_quantized.TestComparatorOps)
caffe2/test:quantized - test_qconv_qnnpack (test_quantized.TestQNNPackOps)
caffe2/test:quantized - test_qlinear_qnnpack (test_quantized.TestQNNPackOps)
caffe2/test:quantized - test_qnnpack_relu (test_quantized.TestQNNPackOps)
caffe2/test:quantized - test_qnnpack_maxpoolMore details at https://our.intern.facebook.com/intern/buck/build/3b394f1e-ab99-4e59-bdf5-2766f46e9869
2d (test_quantized.TestQNNPackOps)
FATAL: 0
TIMEOUT: 0
OMIT: 0
```
Differential Revision: D17538375
fbshipit-source-id: b4b60e93fdec4cc7bbf6aee7182381221dfac243
