fix lack of self arg (#33598)

Author: Jiangxinz

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

@@ -79,7 +79,7 @@ def set_scale(self):
     def set_shift(self):
         pass
 
-    def set_data_type(OpTest):
+    def set_data_type(self):
         pass
 
     def set_input_size(self):

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

@@ -100,7 +100,7 @@ def set_scales(self):
     def set_shifts(self):
         pass
 
-    def set_input_data_type(OpTest):
+    def set_input_data_type(self):
         pass