remove shape validator for merge

mindspore/ops/operations/control_ops.py

@@ -154,14 +154,6 @@ class Merge(PrimitiveWithInfer):
         raise NotImplementedError
 
     def infer_shape(self, inputs):
-        validator.check_integer('inputs len', len(inputs), 0, Rel.GT, self.name)
-        input_0 = inputs[0]
-
-        for i in range(1, len(inputs)):
-            if inputs[i] != input_0:
-                raise ValueError(f"For \'{self.name}\', the shape of {i}th input should be same as "
-                                 f"first input {input_0}, but got {inputs[i]}.")
-
         return (inputs[0], [1])
 
     def infer_dtype(self, inputs):