Remove alias for `l2_normalize` (#27616)

functionality provided by `normalize`

python/paddle/nn/functional/__init__.py

@@ -164,7 +164,6 @@ from .loss import teacher_student_sigmoid_loss  #DEFINE_ALIAS
 from .loss import ctc_loss  #DEFINE_ALIAS
 # from .norm import data_norm        #DEFINE_ALIAS
 # from .norm import group_norm        #DEFINE_ALIAS
-from .norm import l2_normalize  #DEFINE_ALIAS
 from .norm import batch_norm  #DEFINE_ALIAS
 from .norm import instance_norm  #DEFINE_ALIAS
 from .norm import layer_norm  #DEFINE_ALIAS

python/paddle/nn/functional/norm.py

@@ -19,7 +19,6 @@ from ...fluid.data_feeder import check_variable_and_dtype, check_type
 from ...fluid.layer_helper import LayerHelper
 from ...fluid.framework import in_dygraph_mode, core
 from ...framework import create_parameter
-from ...fluid.layers import l2_normalize  #DEFINE_ALIAS
 from ...fluid.layers import lrn  #DEFINE_ALIAS
 from ...fluid.initializer import Constant
 from ...fluid.param_attr import ParamAttr
@@ -29,7 +28,6 @@ __all__ = [
     'batch_norm',
     #       'data_norm',
     'instance_norm',
-    'l2_normalize',
     'layer_norm',
     'lrn',
     'normalize',