Revert "fix conv2d int8 windows UT (#29528)" (#29869)

This reverts commit 067d7f1d0d.

python/paddle/fluid/tests/unittests/mkldnn/test_conv2d_int8_mkldnn_op.py

@@ -28,8 +28,6 @@ def conv2d_forward_refer(input, filter, group, conv_param):
     return out
 
 
-@unittest.skipIf(not core.supports_bfloat16(),
-                 "place does not support oneDNN INT8")
 class TestConv2DInt8Op(TestConv2DOp):
     def setUp(self):
         self.op_type = "conv2d"

tools/windows/run_unittests.sh

@@ -100,6 +100,7 @@ diable_wingpu_test="^test_analysis_predictor$|\
 ^test_print_op$|\
 ^test_py_func_op$|\
 ^test_weight_decay$|\
+^test_conv2d_int8_mkldnn_op$|\
 ^test_crypto$|\
 ^test_callbacks$|\
 ^test_program_prune_backward$|\