Remove duplicated functions in relay_integration (#2370)

python/tvm/autotvm/task/relay_integration.py

@@ -9,7 +9,7 @@ import warnings
 import logging
 
 
-from ... import tensor, placeholder, target as _target
+from ... import target as _target
 
 from .task import create
 from .topi_integration import TaskExtractEnv
@@ -17,38 +17,6 @@ from .topi_integration import TaskExtractEnv
 logger = logging.getLogger('autotvm')
 
 
-def serialize_args(args):
-    """serialize arguments of a topi function to a hashable tuple.
-
-    Parameters
-    ----------
-    args: list of hashable or Tensor
-    """
-    ret = []
-    for t in args:
-        if isinstance(t, tensor.Tensor):
-            ret.append(('TENSOR', get_const_tuple(t.shape), t.dtype))
-        else:
-            ret.append(t)
-    return tuple(ret)
-
-
-def deserialize_args(args):
-    """The inverse function of :code:`serialize_args`.
-
-    Parameters
-    ----------
-    args: list of hashable or Tensor
-    """
-    ret = []
-    for t in args:
-        if isinstance(t, tuple) and t[0] == 'TENSOR':
-            ret.append(placeholder(shape=t[1], dtype=t[2]))
-        else:
-            ret.append(t)
-    return ret
-
-
 def extract_from_program(func, params, ops, target, target_host=None):
     """ Extract tuning tasks from a relay program.